foo.cc:6:2: error: stray '#' in program
    6 | }#include<iostream>
      |  ^
foo.cc:6:3: error: 'include' does not name a type
    6 | }#include<iostream>
      |   ^~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:62,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/ext/type_traits.h:162:35: error: 'bool __gnu_cxx::__is_null_pointer' redeclared as different kind of entity
  162 |   __is_null_pointer(std::nullptr_t)
      |                                   ^
/usr/include/c++/9/ext/type_traits.h:157:5: note: previous declaration 'template<class _Type> bool __gnu_cxx::__is_null_pointer(_Type)'
  157 |     __is_null_pointer(_Type)
      |     ^~~~~~~~~~~~~~~~~
/usr/include/c++/9/ext/type_traits.h:162:26: error: 'nullptr_t' is not a member of 'std'
  162 |   __is_null_pointer(std::nullptr_t)
      |                          ^~~~~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:361:31: error: 'std::size_t' has not been declared
  361 |   template<typename _Tp, std::size_t _Size>
      |                               ^~~~~~
/usr/include/c++/9/type_traits:362:25: error: '_Size' was not declared in this scope
  362 |     struct is_array<_Tp[_Size]>
      |                         ^~~~~
/usr/include/c++/9/type_traits:362:31: error: template argument 1 is invalid
  362 |     struct is_array<_Tp[_Size]>
      |                               ^
/usr/include/c++/9/type_traits:560:42: error: 'nullptr_t' is not a member of 'std'
  560 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                          ^~~~~~~~~
/usr/include/c++/9/type_traits:560:42: error: 'nullptr_t' is not a member of 'std'
/usr/include/c++/9/type_traits:560:51: error: template argument 1 is invalid
  560 |     struct __is_null_pointer_helper<std::nullptr_t>
      |                                                   ^
/usr/include/c++/9/type_traits:1246:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1246 |     : public integral_constant<std::size_t, alignof(_Tp)> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1246:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1246 |     : public integral_constant<std::size_t, alignof(_Tp)> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1246:57: error: template argument 1 is invalid
 1246 |     : public integral_constant<std::size_t, alignof(_Tp)> { };
      |                                                         ^
/usr/include/c++/9/type_traits:1246:57: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1251:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1251 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1251:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1251 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1251:46: error: template argument 1 is invalid
 1251 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
/usr/include/c++/9/type_traits:1251:46: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1253:31: error: 'std::size_t' has not been declared
 1253 |   template<typename _Tp, std::size_t _Size>
      |                               ^~~~~~
/usr/include/c++/9/type_traits:1254:21: error: '_Size' was not declared in this scope
 1254 |     struct rank<_Tp[_Size]>
      |                     ^~~~~
/usr/include/c++/9/type_traits:1254:27: error: template argument 1 is invalid
 1254 |     struct rank<_Tp[_Size]>
      |                           ^
/usr/include/c++/9/type_traits:1255:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1255 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1255:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1255 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1255:65: error: template argument 1 is invalid
 1255 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/9/type_traits:1255:65: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1259:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1259 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1259:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1259 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1259:65: error: template argument 1 is invalid
 1259 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/9/type_traits:1259:65: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1264:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1264 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1264:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1264 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1264:46: error: template argument 1 is invalid
 1264 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
/usr/include/c++/9/type_traits:1264:46: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1266:47: error: 'std::size_t' has not been declared
 1266 |   template<typename _Tp, unsigned _Uint, std::size_t _Size>
      |                                               ^~~~~~
/usr/include/c++/9/type_traits:1267:23: error: '_Size' was not declared in this scope
 1267 |     struct extent<_Tp[_Size], _Uint>
      |                       ^~~~~
/usr/include/c++/9/type_traits:1267:36: error: template argument 1 is invalid
 1267 |     struct extent<_Tp[_Size], _Uint>
      |                                    ^
/usr/include/c++/9/type_traits:1268:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1268 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1268:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1268 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1269:24: error: '_Size' was not declared in this scope
 1269 |           _Uint == 0 ? _Size : extent<_Tp,
      |                        ^~~~~
/usr/include/c++/9/type_traits:1270:28: error: template argument 1 is invalid
 1270 |           _Uint - 1>::value>
      |                            ^
/usr/include/c++/9/type_traits:1270:28: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1275:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1275 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1275:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1275 |     : public integral_constant<std::size_t,
      |                                     ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/bits/move.h:55,
                 from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/type_traits:1277:31: error: template argument 1 is invalid
 1277 |              _Uint - 1>::value>
      |                               ^
/usr/include/c++/9/type_traits:1277:31: note: invalid template non-type parameter
/usr/include/c++/9/type_traits:1832:31: error: 'std::size_t' has not been declared
 1832 |   template<typename _Tp, std::size_t _Size>
      |                               ^~~~~~
/usr/include/c++/9/type_traits:1833:30: error: '_Size' was not declared in this scope
 1833 |     struct remove_extent<_Tp[_Size]>
      |                              ^~~~~
/usr/include/c++/9/type_traits:1833:36: error: template argument 1 is invalid
 1833 |     struct remove_extent<_Tp[_Size]>
      |                                    ^
/usr/include/c++/9/type_traits:1845:31: error: 'std::size_t' has not been declared
 1845 |   template<typename _Tp, std::size_t _Size>
      |                               ^~~~~~
/usr/include/c++/9/type_traits:1846:35: error: '_Size' was not declared in this scope
 1846 |     struct remove_all_extents<_Tp[_Size]>
      |                                   ^~~~~
/usr/include/c++/9/type_traits:1846:41: error: template argument 1 is invalid
 1846 |     struct remove_all_extents<_Tp[_Size]>
      |                                         ^
/usr/include/c++/9/type_traits:1904:17: error: 'std::size_t' has not been declared
 1904 |   template<std::size_t _Len>
      |                 ^~~~~~
/usr/include/c++/9/type_traits:1909:23: error: '_Len' was not declared in this scope
 1909 |  unsigned char __data[_Len];
      |                       ^~~~
/usr/include/c++/9/type_traits:1924:17: error: 'std::size_t' has not been declared
 1924 |   template<std::size_t _Len, std::size_t _Align =
      |                 ^~~~~~
/usr/include/c++/9/type_traits:1924:35: error: 'std::size_t' has not been declared
 1924 |   template<std::size_t _Len, std::size_t _Align =
      |                                   ^~~~~~
/usr/include/c++/9/type_traits:1925:48: error: '_Len' was not declared in this scope
 1925 |     __alignof__(typename __aligned_storage_msa<_Len>::__type)>
      |                                                ^~~~
/usr/include/c++/9/type_traits:1925:52: error: template argument 1 is invalid
 1925 |     __alignof__(typename __aligned_storage_msa<_Len>::__type)>
      |                                                    ^
/usr/include/c++/9/type_traits:1930:23: error: '_Len' was not declared in this scope
 1930 |  unsigned char __data[_Len];
      |                       ^~~~
/usr/include/c++/9/type_traits:1931:37: error: '_Align' was not declared in this scope
 1931 |  struct __attribute__((__aligned__((_Align)))) { } __align;
      |                                     ^~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_pair.h:86:17: error: 'std::size_t' has not been declared
   86 |   template<std::size_t...>
      |                 ^~~~~~
/usr/include/c++/9/bits/stl_pair.h:434:41: error: 'std::size_t' has not been declared
  434 |       template<typename... _Args1, std::size_t... _Indexes1,
      |                                         ^~~~~~
/usr/include/c++/9/bits/stl_pair.h:435:41: error: 'std::size_t' has not been declared
  435 |                typename... _Args2, std::size_t... _Indexes2>
      |                                         ^~~~~~
/usr/include/c++/9/bits/stl_pair.h:437:27: error: '_Indexes1' was not declared in this scope
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                           ^~~~~~~~~
/usr/include/c++/9/bits/stl_pair.h:437:36: error: expected parameter pack before '...'
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                    ^~~
/usr/include/c++/9/bits/stl_pair.h:437:39: error: template argument 1 is invalid
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                       ^
/usr/include/c++/9/bits/stl_pair.h:437:55: error: '_Indexes2' was not declared in this scope
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                       ^~~~~~~~~
/usr/include/c++/9/bits/stl_pair.h:437:64: error: expected parameter pack before '...'
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                                ^~~
/usr/include/c++/9/bits/stl_pair.h:437:67: error: template argument 1 is invalid
  437 |              _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);
      |                                                                   ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:65,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator_base_types.h:116:67: error: 'ptrdiff_t' does not name a type
  116 |   template<typename _Category, typename _Tp, typename _Distance = ptrdiff_t,
      |                                                                   ^~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:65,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator_base_types.h:1:1: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
  +++ |+#include <cstddef>
    1 | // Types used in iterator implementation -*- C++ -*-
In file included from /usr/include/c++/9/bits/stl_algobase.h:65,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator_base_types.h:182:15: error: 'ptrdiff_t' does not name a type
  182 |       typedef ptrdiff_t                   difference_type;
      |               ^~~~~~~~~
/usr/include/c++/9/bits/stl_iterator_base_types.h:182:15: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
/usr/include/c++/9/bits/stl_iterator_base_types.h:193:15: error: 'ptrdiff_t' does not name a type
  193 |       typedef ptrdiff_t                   difference_type;
      |               ^~~~~~~~~
/usr/include/c++/9/bits/stl_iterator_base_types.h:193:15: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
In file included from /usr/include/c++/9/bits/stl_algobase.h:66,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator_base_funcs.h:110:5: error: 'ptrdiff_t' does not name a type
  110 |     ptrdiff_t
      |     ^~~~~~~~~
/usr/include/c++/9/bits/stl_iterator_base_funcs.h:66:1: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
   65 | #include <debug/assertions.h>
  +++ |+#include <cstddef>
   66 | 
/usr/include/c++/9/bits/stl_iterator_base_funcs.h:116:5: error: 'ptrdiff_t' does not name a type
  116 |     ptrdiff_t
      |     ^~~~~~~~~
/usr/include/c++/9/bits/stl_iterator_base_funcs.h:116:5: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
In file included from /usr/include/c++/9/bits/stl_iterator.h:66,
                 from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/ptr_traits.h:109:20: error: 'ptrdiff_t' was not declared in this scope
  109 |  = __detected_or_t<ptrdiff_t, __difference_type, _Ptr>;
      |                    ^~~~~~~~~
/usr/include/c++/9/bits/ptr_traits.h:1:1: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
  +++ |+#include <cstddef>
    1 | // Pointer Traits -*- C++ -*-
/usr/include/c++/9/bits/ptr_traits.h:109:54: error: template argument 1 is invalid
  109 |  = __detected_or_t<ptrdiff_t, __difference_type, _Ptr>;
      |                                                      ^
/usr/include/c++/9/bits/ptr_traits.h:135:15: error: 'ptrdiff_t' does not name a type
  135 |       typedef ptrdiff_t difference_type;
      |               ^~~~~~~~~
/usr/include/c++/9/bits/ptr_traits.h:135:15: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
In file included from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_algobase.h: In static member function 'static _Tp* std::__copy_move<_IsMove, true, std::random_access_iterator_tag>::__copy_m(const _Tp*, const _Tp*, _Tp*)':
/usr/include/c++/9/bits/stl_algobase.h:384:10: error: 'ptrdiff_t' does not name a type
  384 |    const ptrdiff_t _Num = __last - __first;
      |          ^~~~~~~~~
/usr/include/c++/9/bits/stl_algobase.h:72:1: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
   71 | #include <bits/predefined_ops.h>
  +++ |+#include <cstddef>
   72 | #if __cplusplus >= 201103L
/usr/include/c++/9/bits/stl_algobase.h:385:8: error: '_Num' was not declared in this scope
  385 |    if (_Num)
      |        ^~~~
/usr/include/c++/9/bits/stl_algobase.h:387:22: error: '_Num' was not declared in this scope
  387 |    return __result + _Num;
      |                      ^~~~
/usr/include/c++/9/bits/stl_algobase.h: In static member function 'static _Tp* std::__copy_move_backward<_IsMove, true, std::random_access_iterator_tag>::__copy_move_b(const _Tp*, const _Tp*, _Tp*)':
/usr/include/c++/9/bits/stl_algobase.h:586:10: error: 'ptrdiff_t' does not name a type
  586 |    const ptrdiff_t _Num = __last - __first;
      |          ^~~~~~~~~
/usr/include/c++/9/bits/stl_algobase.h:586:10: note: 'ptrdiff_t' is defined in header '<cstddef>'; did you forget to '#include <cstddef>'?
/usr/include/c++/9/bits/stl_algobase.h:587:8: error: '_Num' was not declared in this scope
  587 |    if (_Num)
      |        ^~~~
/usr/include/c++/9/bits/stl_algobase.h:589:22: error: '_Num' was not declared in this scope
  589 |    return __result - _Num;
      |                      ^~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new: At global scope:
/usr/include/c++/9/new:125:50: error: declaration of 'operator new' as non-function
  125 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                                  ^
/usr/include/c++/9/new:125:44: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  125 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                            ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:126:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  126 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/9/new:127:52: error: declaration of 'operator new []' as non-function
  127 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                                    ^
/usr/include/c++/9/new:127:46: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  127 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                              ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:128:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  128 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/9/new:139:44: error: declaration of 'operator new' as non-function
  139 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                            ^~~~~~
/usr/include/c++/9/new:139:44: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:139:52: error: expected primary-expression before 'const'
  139 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                                    ^~~~~
/usr/include/c++/9/new:141:46: error: declaration of 'operator new []' as non-function
  141 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                              ^~~~~~
/usr/include/c++/9/new:141:46: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:141:54: error: expected primary-expression before 'const'
  141 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
      |                                                      ^~~~~
/usr/include/c++/9/new:173:51: error: declaration of 'operator new' as non-function
  173 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                   ^~~~~~
/usr/include/c++/9/new:173:51: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:173:59: error: expected primary-expression before 'void'
  173 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                           ^~~~
/usr/include/c++/9/new:175:53: error: declaration of 'operator new []' as non-function
  175 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                     ^~~~~~
/usr/include/c++/9/new:175:53: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/ext/new_allocator.h:33,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/new:175:61: error: expected primary-expression before 'void'
  175 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                             ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/ext/new_allocator.h:44:14: error: 'std::size_t' has not been declared
   44 |   using std::size_t;
      |              ^~~~~~
/usr/include/c++/9/ext/new_allocator.h:45:14: error: 'std::ptrdiff_t' has not been declared
   45 |   using std::ptrdiff_t;
      |              ^~~~~~~~~
In file included from /usr/include/c++/9/ext/alloc_traits.h:36,
                 from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/bits/alloc_traits.h:411:36: error: 'ptrdiff_t' in namespace 'std' does not name a type
  411 |       using difference_type = std::ptrdiff_t;
      |                                    ^~~~~~~~~
/usr/include/c++/9/bits/alloc_traits.h:414:30: error: 'size_t' in namespace 'std' does not name a type
  414 |       using size_type = std::size_t;
      |                              ^~~~~~
/usr/include/c++/9/bits/alloc_traits.h:442:37: error: 'size_type' has not been declared
  442 |       allocate(allocator_type& __a, size_type __n)
      |                                     ^~~~~~~~~
/usr/include/c++/9/bits/alloc_traits.h:456:37: error: 'size_type' has not been declared
  456 |       allocate(allocator_type& __a, size_type __n, const_void_pointer __hint)
      |                                     ^~~~~~~~~
/usr/include/c++/9/bits/alloc_traits.h:468:52: error: 'size_type' has not been declared
  468 |       deallocate(allocator_type& __a, pointer __p, size_type __n)
      |                                                    ^~~~~~~~~
/usr/include/c++/9/bits/alloc_traits.h:503:14: error: 'size_type' does not name a type; did you mean 'true_type'?
  503 |       static size_type
      |              ^~~~~~~~~
      |              true_type
In file included from /usr/include/c++/9/vector:68,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_bvector.h:143:63: error: template argument 3 is invalid
  143 |   : public std::iterator<std::random_access_iterator_tag, bool>
      |                                                               ^
/usr/include/c++/9/bits/stl_bvector.h: In member function 'void std::_Bit_iterator_base::_M_incr(ptrdiff_t)':
/usr/include/c++/9/bits/stl_bvector.h:174:7: error: 'difference_type' was not declared in this scope
  174 |       difference_type __n = __i + _M_offset;
      |       ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:175:15: error: '__n' was not declared in this scope; did you mean '__i'?
  175 |       _M_p += __n / int(_S_word_bit);
      |               ^~~
      |               __i
/usr/include/c++/9/bits/stl_bvector.h: At global scope:
/usr/include/c++/9/bits/stl_bvector.h:270:16: error: declaration of 'operator+=' as non-function
  270 |     operator+=(difference_type __i)
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:270:13: error: expected ';' at end of member declaration
  270 |     operator+=(difference_type __i)
      |             ^~
      |               ;
/usr/include/c++/9/bits/stl_bvector.h:270:31: error: expected ')' before '__i'
  270 |     operator+=(difference_type __i)
      |               ~               ^~~~
      |                               )
/usr/include/c++/9/bits/stl_bvector.h:277:16: error: declaration of 'operator-=' as non-function
  277 |     operator-=(difference_type __i)
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:277:13: error: expected ';' at end of member declaration
  277 |     operator-=(difference_type __i)
      |             ^~
      |               ;
/usr/include/c++/9/bits/stl_bvector.h:277:31: error: expected ')' before '__i'
  277 |     operator-=(difference_type __i)
      |               ~               ^~~~
      |                               )
/usr/include/c++/9/bits/stl_bvector.h:284:15: error: 'difference_type' has not been declared
  284 |     operator+(difference_type __i) const
      |               ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:291:15: error: 'difference_type' has not been declared
  291 |     operator-(difference_type __i) const
      |               ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:298:16: error: 'difference_type' has not been declared
  298 |     operator[](difference_type __i) const
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h: In member function 'std::_Bit_iterator::iterator std::_Bit_iterator::operator+(int) const':
/usr/include/c++/9/bits/stl_bvector.h:287:20: error: no match for 'operator+=' (operand types are 'std::_Bit_iterator::iterator' {aka 'std::_Bit_iterator'} and 'int')
  287 |       return __tmp += __i;
      |              ~~~~~~^~~~~~
/usr/include/c++/9/bits/stl_bvector.h: In member function 'std::_Bit_iterator::iterator std::_Bit_iterator::operator-(int) const':
/usr/include/c++/9/bits/stl_bvector.h:294:20: error: no match for 'operator-=' (operand types are 'std::_Bit_iterator::iterator' {aka 'std::_Bit_iterator'} and 'int')
  294 |       return __tmp -= __i;
      |              ~~~~~~^~~~~~
/usr/include/c++/9/bits/stl_bvector.h: At global scope:
/usr/include/c++/9/bits/stl_bvector.h:360:16: error: declaration of 'operator+=' as non-function
  360 |     operator+=(difference_type __i)
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:360:13: error: expected ';' at end of member declaration
  360 |     operator+=(difference_type __i)
      |             ^~
      |               ;
/usr/include/c++/9/bits/stl_bvector.h:360:31: error: expected ')' before '__i'
  360 |     operator+=(difference_type __i)
      |               ~               ^~~~
      |                               )
/usr/include/c++/9/bits/stl_bvector.h:367:16: error: declaration of 'operator-=' as non-function
  367 |     operator-=(difference_type __i)
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:367:13: error: expected ';' at end of member declaration
  367 |     operator-=(difference_type __i)
      |             ^~
      |               ;
/usr/include/c++/9/bits/stl_bvector.h:367:31: error: expected ')' before '__i'
  367 |     operator-=(difference_type __i)
      |               ~               ^~~~
      |                               )
/usr/include/c++/9/bits/stl_bvector.h:374:15: error: 'difference_type' has not been declared
  374 |     operator+(difference_type __i) const
      |               ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:381:15: error: 'difference_type' has not been declared
  381 |     operator-(difference_type __i) const
      |               ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h:388:16: error: 'difference_type' has not been declared
  388 |     operator[](difference_type __i) const
      |                ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_bvector.h: In member function 'std::_Bit_const_iterator::const_iterator std::_Bit_const_iterator::operator+(int) const':
/usr/include/c++/9/bits/stl_bvector.h:377:20: error: no match for 'operator+=' (operand types are 'std::_Bit_const_iterator::const_iterator' {aka 'std::_Bit_const_iterator'} and 'int')
  377 |       return __tmp += __i;
      |              ~~~~~~^~~~~~
/usr/include/c++/9/bits/stl_bvector.h: In member function 'std::_Bit_const_iterator::const_iterator std::_Bit_const_iterator::operator-(int) const':
/usr/include/c++/9/bits/stl_bvector.h:384:20: error: no match for 'operator-=' (operand types are 'std::_Bit_const_iterator::const_iterator' {aka 'std::_Bit_const_iterator'} and 'int')
  384 |       return __tmp -= __i;
      |              ~~~~~~^~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator.h: In instantiation of 'class std::reverse_iterator<std::_Bit_iterator>':
/usr/include/c++/9/bits/stl_bvector.h:828:7:   required from here
/usr/include/c++/9/bits/stl_iterator.h:105:11: error: no type named 'iterator_category' in 'struct std::iterator_traits<std::_Bit_iterator>'
  105 |     class reverse_iterator
      |           ^~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:119:55: error: no type named 'difference_type' in 'struct std::iterator_traits<std::_Bit_iterator>'
  119 |       typedef typename __traits_type::difference_type difference_type;
      |                                                       ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:120:48: error: no type named 'pointer' in 'struct std::iterator_traits<std::_Bit_iterator>'
  120 |       typedef typename __traits_type::pointer  pointer;
      |                                                ^~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:121:50: error: no type named 'reference' in 'struct std::iterator_traits<std::_Bit_iterator>'
  121 |       typedef typename __traits_type::reference  reference;
      |                                                  ^~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h: In instantiation of 'class std::reverse_iterator<std::_Bit_const_iterator>':
/usr/include/c++/9/bits/stl_bvector.h:832:7:   required from here
/usr/include/c++/9/bits/stl_iterator.h:105:11: error: no type named 'iterator_category' in 'struct std::iterator_traits<std::_Bit_const_iterator>'
  105 |     class reverse_iterator
      |           ^~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:119:55: error: no type named 'difference_type' in 'struct std::iterator_traits<std::_Bit_const_iterator>'
  119 |       typedef typename __traits_type::difference_type difference_type;
      |                                                       ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:120:48: error: no type named 'pointer' in 'struct std::iterator_traits<std::_Bit_const_iterator>'
  120 |       typedef typename __traits_type::pointer  pointer;
      |                                                ^~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:121:50: error: no type named 'reference' in 'struct std::iterator_traits<std::_Bit_const_iterator>'
  121 |       typedef typename __traits_type::reference  reference;
      |                                                  ^~~~~~~~~
In file included from /usr/include/c++/9/string:40,
                 from foo.cc:9:
/usr/include/c++/9/bits/char_traits.h: At global scope:
/usr/include/c++/9/bits/char_traits.h:108:66: error: 'std::size_t' has not been declared
  108 |       compare(const char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                                  ^~~~~~
/usr/include/c++/9/bits/char_traits.h:110:40: error: 'size_t' in namespace 'std' does not name a type
  110 |       static _GLIBCXX14_CONSTEXPR std::size_t
      |                                        ^~~~~~
/usr/include/c++/9/bits/char_traits.h:114:39: error: 'std::size_t' has not been declared
  114 |       find(const char_type* __s, std::size_t __n, const char_type& __a);
      |                                       ^~~~~~
/usr/include/c++/9/bits/char_traits.h:117:57: error: 'std::size_t' has not been declared
  117 |       move(char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                         ^~~~~~
/usr/include/c++/9/bits/char_traits.h:120:57: error: 'std::size_t' has not been declared
  120 |       copy(char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                         ^~~~~~
/usr/include/c++/9/bits/char_traits.h:123:35: error: 'std::size_t' has not been declared
  123 |       assign(char_type* __s, std::size_t __n, char_type __a);
      |                                   ^~~~~~
/usr/include/c++/9/bits/char_traits.h:149:64: error: 'std::size_t' has not been declared
  149 |     compare(const char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                                ^~~~~~
/usr/include/c++/9/bits/char_traits.h: In static member function 'static int __gnu_cxx::char_traits<_CharT>::compare(const char_type*, const char_type*, int)':
/usr/include/c++/9/bits/char_traits.h:151:17: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  151 |       for (std::size_t __i = 0; __i < __n; ++__i)
      |                 ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/string:40,
                 from foo.cc:9:
/usr/include/c++/9/bits/char_traits.h:151:33: error: '__i' was not declared in this scope; did you mean '__n'?
  151 |       for (std::size_t __i = 0; __i < __n; ++__i)
      |                                 ^~~
      |                                 __n
/usr/include/c++/9/bits/char_traits.h: At global scope:
/usr/include/c++/9/bits/char_traits.h:160:31: error: 'size_t' in namespace 'std' does not name a type
  160 |     _GLIBCXX14_CONSTEXPR std::size_t
      |                               ^~~~~~
/usr/include/c++/9/bits/char_traits.h:173:37: error: 'std::size_t' has not been declared
  173 |     find(const char_type* __s, std::size_t __n, const char_type& __a)
      |                                     ^~~~~~
/usr/include/c++/9/bits/char_traits.h: In static member function 'static const char_type* __gnu_cxx::char_traits<_CharT>::find(const char_type*, int, const char_type&)':
/usr/include/c++/9/bits/char_traits.h:175:17: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
  175 |       for (std::size_t __i = 0; __i < __n; ++__i)
      |                 ^~~~~~
In file included from /usr/include/stdio.h:33,
                 from foo.cc:1:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:209:23: note: 'size_t' declared here
  209 | typedef __SIZE_TYPE__ size_t;
      |                       ^~~~~~
In file included from /usr/include/c++/9/string:40,
                 from foo.cc:9:
/usr/include/c++/9/bits/char_traits.h:175:33: error: '__i' was not declared in this scope; did you mean '__s'?
  175 |       for (std::size_t __i = 0; __i < __n; ++__i)
      |                                 ^~~
      |                                 __s
/usr/include/c++/9/bits/char_traits.h: At global scope:
/usr/include/c++/9/bits/char_traits.h:184:55: error: 'std::size_t' has not been declared
  184 |     move(char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                       ^~~~~~
/usr/include/c++/9/bits/char_traits.h:195:55: error: 'std::size_t' has not been declared
  195 |     copy(char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                       ^~~~~~
/usr/include/c++/9/bits/char_traits.h:205:33: error: 'std::size_t' has not been declared
  205 |     assign(char_type* __s, std::size_t __n, char_type __a)
      |                                 ^~~~~~
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:55:51: error: 'std::size_t' has not been declared
   55 |     const char* __name, const _CharT* __str, std::size_t* __idx,
      |                                                   ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:48: error: 'std::size_t' has not been declared
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |                                                ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:100:31: error: 'std::size_t' has not been declared
  100 |      __builtin_va_list), std::size_t __n,
      |                               ^~~~~~
In file included from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<char>, char>':
/usr/include/c++/9/bits/basic_string.h:84:24:   required from 'class std::__cxx11::basic_string<char>'
/usr/include/c++/9/bits/basic_string.h:6507:68:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<char> >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<char> >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::_Base_type {aka std::allocator_traits<std::allocator<char> >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::_Base_type' {aka 'struct std::allocator_traits<std::allocator<char> >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In function 'int std::__cxx11::stoi(const string&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6508:19: error: no matching function for call to '__stoa<long int, int>(long int (*)(const char*, char**, int) throw (), const char [5], const char*, size_t*&, int&)'
 6508 |      __idx, __base); }
      |                   ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6508:6: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6508 |      __idx, __base); }
      |      ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long int std::__cxx11::stol(const string&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6513:22: error: no matching function for call to '__stoa(long int (*)(const char*, char**, int) throw (), const char [5], const char*, size_t*&, int&)'
 6513 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6513:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6513 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long unsigned int std::__cxx11::stoul(const string&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6518:22: error: no matching function for call to '__stoa(long unsigned int (*)(const char*, char**, int) throw (), const char [6], const char*, size_t*&, int&)'
 6518 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6518:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6518 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long long int std::__cxx11::stoll(const string&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6523:22: error: no matching function for call to '__stoa(long long int (*)(const char*, char**, int) throw (), const char [6], const char*, size_t*&, int&)'
 6523 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6523:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6523 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long long unsigned int std::__cxx11::stoull(const string&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6528:22: error: no matching function for call to '__stoa(long long unsigned int (*)(const char*, char**, int) throw (), const char [7], const char*, size_t*&, int&)'
 6528 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6528:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6528 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'float std::__cxx11::stof(const string&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6533:72: error: no matching function for call to '__stoa(float (*)(const char*, char**) throw (), const char [5], const char*, size_t*&)'
 6533 |   { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
      |                                                                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6533:67: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6533 |   { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
      |                                                                   ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'double std::__cxx11::stod(const string&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6537:72: error: no matching function for call to '__stoa(double (*)(const char*, char**) throw (), const char [5], const char*, size_t*&)'
 6537 |   { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
      |                                                                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6537:67: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6537 |   { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
      |                                                                   ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long double std::__cxx11::stold(const string&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6541:74: error: no matching function for call to '__stoa(long double (*)(const char*, char**) throw (), const char [6], const char*, size_t*&)'
 6541 |   { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
      |                                                                          ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6541:69: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6541 |   { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
      |                                                                     ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(int)':
/usr/include/c++/9/bits/basic_string.h:6551:20: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [3], int&)'
 6551 |         "%d", __val); }
      |                    ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6551:20: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6551 |         "%d", __val); }
      |                    ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6557:20: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [3], unsigned int&)'
 6557 |         "%u", __val); }
      |                    ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6557:20: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6557 |         "%u", __val); }
      |                    ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(long int)':
/usr/include/c++/9/bits/basic_string.h:6562:21: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [4], long int&)'
 6562 |         "%ld", __val); }
      |                     ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6562:21: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6562 |         "%ld", __val); }
      |                     ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(long unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6568:21: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [4], long unsigned int&)'
 6568 |         "%lu", __val); }
      |                     ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6568:21: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6568 |         "%lu", __val); }
      |                     ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(long long int)':
/usr/include/c++/9/bits/basic_string.h:6574:22: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [5], long long int&)'
 6574 |         "%lld", __val); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6574:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6574 |         "%lld", __val); }
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(long long unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6580:22: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), long unsigned int, const char [5], long long unsigned int&)'
 6580 |         "%llu", __val); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6580:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6580 |         "%llu", __val); }
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(float)':
/usr/include/c++/9/bits/basic_string.h:6588:20: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), const int&, const char [3], float&)'
 6588 |         "%f", __val);
      |                    ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6588:20: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6588 |         "%f", __val);
      |                    ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(double)':
/usr/include/c++/9/bits/basic_string.h:6597:20: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), const int&, const char [3], double&)'
 6597 |         "%f", __val);
      |                    ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6597:20: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6597 |         "%f", __val);
      |                    ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::string std::__cxx11::to_string(long double)':
/usr/include/c++/9/bits/basic_string.h:6606:21: error: no matching function for call to '__to_xstring<std::string>(int (*)(char*, size_t, const char*, __va_list_tag*) throw (), const int&, const char [4], long double&)'
 6606 |         "%Lf", __val);
      |                     ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6606:21: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6606 |         "%Lf", __val);
      |                     ^
In file included from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<wchar_t>, wchar_t>':
/usr/include/c++/9/bits/basic_string.h:84:24:   required from 'class std::__cxx11::basic_string<wchar_t>'
/usr/include/c++/9/bits/basic_string.h:6613:68:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<wchar_t> >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<wchar_t> >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<wchar_t>, wchar_t>::_Base_type {aka std::allocator_traits<std::allocator<wchar_t> >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<wchar_t>, wchar_t>::_Base_type' {aka 'struct std::allocator_traits<std::allocator<wchar_t> >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In function 'int std::__cxx11::stoi(const wstring&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6614:19: error: no matching function for call to '__stoa<long int, int>(long int (*)(const wchar_t*, wchar_t**, int) throw (), const char [5], const wchar_t*, size_t*&, int&)'
 6614 |      __idx, __base); }
      |                   ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6614:6: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6614 |      __idx, __base); }
      |      ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long int std::__cxx11::stol(const wstring&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6619:22: error: no matching function for call to '__stoa(long int (*)(const wchar_t*, wchar_t**, int) throw (), const char [5], const wchar_t*, size_t*&, int&)'
 6619 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6619:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6619 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long unsigned int std::__cxx11::stoul(const wstring&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6624:22: error: no matching function for call to '__stoa(long unsigned int (*)(const wchar_t*, wchar_t**, int) throw (), const char [6], const wchar_t*, size_t*&, int&)'
 6624 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6624:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6624 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long long int std::__cxx11::stoll(const wstring&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6629:22: error: no matching function for call to '__stoa(long long int (*)(const wchar_t*, wchar_t**, int) throw (), const char [6], const wchar_t*, size_t*&, int&)'
 6629 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6629:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6629 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long long unsigned int std::__cxx11::stoull(const wstring&, size_t*, int)':
/usr/include/c++/9/bits/basic_string.h:6634:22: error: no matching function for call to '__stoa(long long unsigned int (*)(const wchar_t*, wchar_t**, int) throw (), const char [7], const wchar_t*, size_t*&, int&)'
 6634 |         __idx, __base); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6634:9: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6634 |         __idx, __base); }
      |         ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'float std::__cxx11::stof(const wstring&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6639:72: error: no matching function for call to '__stoa(float (*)(const wchar_t*, wchar_t**) throw (), const char [5], const wchar_t*, size_t*&)'
 6639 |   { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
      |                                                                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6639:67: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6639 |   { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
      |                                                                   ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'double std::__cxx11::stod(const wstring&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6643:72: error: no matching function for call to '__stoa(double (*)(const wchar_t*, wchar_t**) throw (), const char [5], const wchar_t*, size_t*&)'
 6643 |   { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
      |                                                                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6643:67: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6643 |   { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
      |                                                                   ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'long double std::__cxx11::stold(const wstring&, size_t*)':
/usr/include/c++/9/bits/basic_string.h:6647:74: error: no matching function for call to '__stoa(long double (*)(const wchar_t*, wchar_t**) throw (), const char [6], const wchar_t*, size_t*&)'
 6647 |   { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
      |                                                                          ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:54:5: note: candidate: 'template<class _TRet, class _Ret, class _CharT, class ... _Base> _Ret __gnu_cxx::__stoa(_TRet (*)(const _CharT*, _CharT**, _Base ...), const char*, const _CharT*, int*, _Base ...)'
   54 |     __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),
      |     ^~~~~~
/usr/include/c++/9/ext/string_conversions.h:54:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6647:69: note:   cannot convert '__idx' (type 'size_t*' {aka 'long unsigned int*'}) to type 'int*'
 6647 |   { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
      |                                                                     ^~~~~
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(int)':
/usr/include/c++/9/bits/basic_string.h:6654:22: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [3], int&)'
 6654 |          L"%d", __val); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6654:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6654 |          L"%d", __val); }
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6660:22: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [3], unsigned int&)'
 6660 |          L"%u", __val); }
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6660:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6660 |          L"%u", __val); }
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(long int)':
/usr/include/c++/9/bits/basic_string.h:6665:23: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [4], long int&)'
 6665 |          L"%ld", __val); }
      |                       ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6665:23: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6665 |          L"%ld", __val); }
      |                       ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(long unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6671:23: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [4], long unsigned int&)'
 6671 |          L"%lu", __val); }
      |                       ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6671:23: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6671 |          L"%lu", __val); }
      |                       ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(long long int)':
/usr/include/c++/9/bits/basic_string.h:6677:24: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [5], long long int&)'
 6677 |          L"%lld", __val); }
      |                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6677:24: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6677 |          L"%lld", __val); }
      |                        ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(long long unsigned int)':
/usr/include/c++/9/bits/basic_string.h:6683:24: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), long unsigned int, const wchar_t [5], long long unsigned int&)'
 6683 |          L"%llu", __val); }
      |                        ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6683:24: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6683 |          L"%llu", __val); }
      |                        ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(float)':
/usr/include/c++/9/bits/basic_string.h:6691:22: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), const int&, const wchar_t [3], float&)'
 6691 |          L"%f", __val);
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6691:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6691 |          L"%f", __val);
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(double)':
/usr/include/c++/9/bits/basic_string.h:6700:22: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), const int&, const wchar_t [3], double&)'
 6700 |          L"%f", __val);
      |                      ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6700:22: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6700 |          L"%f", __val);
      |                      ^
/usr/include/c++/9/bits/basic_string.h: In function 'std::wstring std::__cxx11::to_wstring(long double)':
/usr/include/c++/9/bits/basic_string.h:6709:23: error: no matching function for call to '__to_xstring<std::wstring>(int (*)(wchar_t*, size_t, const wchar_t*, __va_list_tag*) throw (), const int&, const wchar_t [4], long double&)'
 6709 |          L"%Lf", __val);
      |                       ^
In file included from /usr/include/c++/9/bits/basic_string.h:6496,
                 from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/ext/string_conversions.h:99:5: note: candidate: 'template<class _String, class _CharT> _String __gnu_cxx::__to_xstring(int (*)(_CharT*, int, const _CharT*, __va_list_tag*), int, const _CharT*, ...)'
   99 |     __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,
      |     ^~~~~~~~~~~~
/usr/include/c++/9/ext/string_conversions.h:99:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h:6709:23: note:   mismatched types 'int' and 'size_t' {aka 'long unsigned int'}
 6709 |          L"%Lf", __val);
      |                       ^
/usr/include/c++/9/bits/basic_string.h: In member function 'size_t std::hash<std::__cxx11::basic_string<char> >::operator()(const string&) const':
/usr/include/c++/9/bits/basic_string.h:6738:54: error: 'const string' {aka 'const class std::__cxx11::basic_string<char>'} has no member named 'length'
 6738 |       { return std::_Hash_impl::hash(__s.data(), __s.length()); }
      |                                                      ^~~~~~
/usr/include/c++/9/bits/basic_string.h: In member function 'size_t std::hash<std::__cxx11::basic_string<wchar_t> >::operator()(const wstring&) const':
/usr/include/c++/9/bits/basic_string.h:6754:42: error: 'const wstring' {aka 'const class std::__cxx11::basic_string<wchar_t>'} has no member named 'length'
 6754 |                                      __s.length() * sizeof(wchar_t)); }
      |                                          ^~~~~~
In file included from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<char16_t>, char16_t>':
/usr/include/c++/9/bits/basic_string.h:84:24:   required from 'class std::__cxx11::basic_string<char16_t>'
/usr/include/c++/9/bits/basic_string.h:6787:41:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<char16_t> >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<char16_t> >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<char16_t>, char16_t>::_Base_type {aka std::allocator_traits<std::allocator<char16_t> >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<char16_t>, char16_t>::_Base_type' {aka 'struct std::allocator_traits<std::allocator<char16_t> >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In member function 'size_t std::hash<std::__cxx11::basic_string<char16_t> >::operator()(const u16string&) const':
/usr/include/c++/9/bits/basic_string.h:6788:42: error: 'const u16string' {aka 'const class std::__cxx11::basic_string<char16_t>'} has no member named 'length'
 6788 |                                      __s.length() * sizeof(char16_t)); }
      |                                          ^~~~~~
In file included from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<char32_t>, char32_t>':
/usr/include/c++/9/bits/basic_string.h:84:24:   required from 'class std::__cxx11::basic_string<char32_t>'
/usr/include/c++/9/bits/basic_string.h:6802:41:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<char32_t> >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<char32_t> >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<char32_t>, char32_t>::_Base_type {aka std::allocator_traits<std::allocator<char32_t> >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<char32_t>, char32_t>::_Base_type' {aka 'struct std::allocator_traits<std::allocator<char32_t> >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In member function 'size_t std::hash<std::__cxx11::basic_string<char32_t> >::operator()(const u32string&) const':
/usr/include/c++/9/bits/basic_string.h:6803:42: error: 'const u32string' {aka 'const class std::__cxx11::basic_string<char32_t>'} has no member named 'length'
 6803 |                                      __s.length() * sizeof(char32_t)); }
      |                                          ^~~~~~
In file included from /usr/include/c++/9/bits/stl_construct.h:61,
                 from /usr/include/c++/9/vector:65,
                 from foo.cc:7:
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<int>, int>':
/usr/include/c++/9/bits/stl_vector.h:84:21:   required from 'struct std::_Vector_base<int, std::allocator<int> >'
/usr/include/c++/9/bits/stl_vector.h:386:11:   required from 'class std::vector<int>'
foo.cc:17:12:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<int> >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<int> >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::_Base_type {aka std::allocator_traits<std::allocator<int> >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::_Base_type' {aka 'struct std::allocator_traits<std::allocator<int> >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h: In instantiation of 'struct __gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char> >, std::__cxx11::basic_string<char> >':
/usr/include/c++/9/bits/stl_vector.h:84:21:   required from 'struct std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char> > >'
/usr/include/c++/9/bits/stl_vector.h:386:11:   required from 'class std::vector<std::__cxx11::basic_string<char> >'
foo.cc:22:22:   required from here
/usr/include/c++/9/ext/alloc_traits.h:61:53: error: no type named 'size_type' in 'struct std::allocator_traits<std::allocator<std::__cxx11::basic_string<char> > >'
   61 |     typedef typename _Base_type::size_type          size_type;
      |                                                     ^~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:62:53: error: no type named 'difference_type' in 'struct std::allocator_traits<std::allocator<std::__cxx11::basic_string<char> > >'
   62 |     typedef typename _Base_type::difference_type    difference_type;
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/c++/9/ext/alloc_traits.h:70:23: error: no members matching '__gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char> >, std::__cxx11::basic_string<char> >::_Base_type {aka std::allocator_traits<std::allocator<std::__cxx11::basic_string<char> > >}::max_size' in '__gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char> >, std::__cxx11::basic_string<char> >::_Base_type' {aka 'struct std::allocator_traits<std::allocator<std::__cxx11::basic_string<char> > >'}
   70 |     using _Base_type::max_size;
      |                       ^~~~~~~~
foo.cc: At global scope:
foo.cc:30:5: error: redefinition of 'int main()'
   30 | int main()
      |     ^~~~
foo.cc:3:5: note: 'int main()' previously defined here
    3 | int main()
      |     ^~~~
foo.cc: In function 'int main()':
foo.cc:32:9: error: 'cin' was not declared in this scope
   32 |  int n; cin >> n;
      |         ^~~
foo.cc:10:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    9 | #include<string>
  +++ |+#include <iostream>
   10 | using namespace std;
foo.cc:44:3: error: 'cout' was not declared in this scope
   44 |   cout << name[i] << " " << id[i] << endl;
      |   ^~~~
foo.cc:44:3: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:44:38: error: 'endl' was not declared in this scope
   44 |   cout << name[i] << " " << id[i] << endl;
      |                                      ^~~~
foo.cc:10:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    9 | #include<string>
  +++ |+#include <ostream>
   10 | using namespace std;
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In instantiation of 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]':
foo.cc:23:25:   required from here
/usr/include/c++/9/bits/basic_string.h:681:18: error: using invalid field 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::<unnamed union>::_M_allocated_capacity'
  681 |       _M_destroy(_M_allocated_capacity);
      |                  ^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/basic_string.h:691:18: error: using invalid field 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::<unnamed union>::_M_allocated_capacity'
  691 |       _M_destroy(_M_allocated_capacity);
      |                  ^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/vector:60,
                 from foo.cc:7:
/usr/include/c++/9/bits/stl_iterator.h: In instantiation of 'class __gnu_cxx::__normal_iterator<int*, std::vector<int> >':
/usr/include/c++/9/bits/stl_vector.h:1195:4:   required from 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::value_type = int]'
foo.cc:39:17:   required from here
/usr/include/c++/9/bits/stl_iterator.h:795:56: error: no type named 'difference_type' in 'struct std::iterator_traits<int*>'
  795 |       typedef typename __traits_type::difference_type  difference_type;
      |                                                        ^~~~~~~~~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h: In instantiation of 'class __gnu_cxx::__normal_iterator<std::__cxx11::basic_string<char>*, std::vector<std::__cxx11::basic_string<char> > >':
/usr/include/c++/9/bits/stl_vector.h:1195:4:   required from 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string<char>]'
foo.cc:40:19:   required from here
/usr/include/c++/9/bits/stl_iterator.h:795:56: error: no type named 'difference_type' in 'struct std::iterator_traits<std::__cxx11::basic_string<char>*>'
In file included from /usr/include/c++/9/string:55,
                 from foo.cc:9:
/usr/include/c++/9/bits/basic_string.h: In instantiation of 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::_M_dispose() [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]':
/usr/include/c++/9/bits/basic_string.h:662:9:   required from 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::~basic_string() [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
foo.cc:22:22:   required from here
/usr/include/c++/9/bits/basic_string.h:236:15: error: using invalid field 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::<unnamed union>::_M_allocated_capacity'
  236 |    _M_destroy(_M_allocated_capacity);
      |               ^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/c++allocator.h:33,
                 from /usr/include/c++/9/bits/allocator.h:46,
                 from /usr/include/c++/9/vector:64,
                 from foo.cc:7:
/usr/include/c++/9/ext/new_allocator.h: In instantiation of 'void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = int; _Args = {const int&}; _Tp = int]':
/usr/include/c++/9/bits/alloc_traits.h:483:4:   required from 'static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = int; _Args = {const int&}; _Tp = int; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<int>]'
/usr/include/c++/9/bits/stl_vector.h:1189:30:   required from 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::value_type = int]'
foo.cc:39:17:   required from here
/usr/include/c++/9/ext/new_allocator.h:146:4: error: no matching function for call to 'operator new(sizetype, void*)'
  146 |  { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<built-in>: note: candidate: 'void* operator new(long unsigned int)'
<built-in>: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/9/ext/new_allocator.h: In instantiation of 'void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = std::__cxx11::basic_string<char>; _Args = {const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&}; _Tp = std::__cxx11::basic_string<char>]':
/usr/include/c++/9/bits/alloc_traits.h:483:4:   required from 'static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = std::__cxx11::basic_string<char>; _Args = {const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&}; _Tp = std::__cxx11::basic_string<char>; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<std::__cxx11::basic_string<char> >]'
/usr/include/c++/9/bits/stl_vector.h:1189:30:   required from 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string<char>]'
foo.cc:40:19:   required from here
/usr/include/c++/9/ext/new_allocator.h:146:4: error: no matching function for call to 'operator new(sizetype, void*)'
<built-in>: note: candidate: 'void* operator new(long unsigned int)'
<built-in>: note:   candidate expects 1 argument, 2 provided

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