/in/foo.cc: In function 'int main()':
/in/foo.cc:18:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |                 for(int i=0;i<s.size()-1;i++){
      |                             ~^~~~~~~~~~~
In file included from /usr/include/c++/12/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/12/bits/stdc++.h:65,
                 from /in/foo.cc:1:
In function 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __cxx11::basic_string<char>*; _Compare = __gnu_cxx::__ops::_Iter_less_iter]',
    inlined from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __cxx11::basic_string<char>*; _Compare = __gnu_cxx::__ops::_Iter_less_iter]' at /usr/include/c++/12/bits/stl_algo.h:1844:5,
    inlined from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __cxx11::basic_string<char>*; _Compare = __gnu_cxx::__ops::_Iter_less_iter]' at /usr/include/c++/12/bits/stl_algo.h:1940:31,
    inlined from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __cxx11::basic_string<char>*; _Compare = __gnu_cxx::__ops::_Iter_less_iter]' at /usr/include/c++/12/bits/stl_algo.h:1932:5,
    inlined from 'void std::sort(_RAIter, _RAIter) [with _RAIter = __cxx11::basic_string<char>*]' at /usr/include/c++/12/bits/stl_algo.h:4820:18,
    inlined from 'int main()' at /in/foo.cc:12:7:
/usr/include/c++/12/bits/stl_algo.h:1849:32: warning: array subscript 17 is outside array bounds of 'std::string [15]' {aka 'std::__cxx11::basic_string<char> [15]'} [-Warray-bounds]
 1849 |           std::__insertion_sort(__first, __first + int(_S_threshold), __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:4:8: note: at offset 544 into object 'a' of size 480
    4 | string a[15];
      |        ^