/in/foo.cc: In function 'int main()':
/in/foo.cc:24:34: error: no matching function for call to 'max(int&, std::__cxx11::basic_string<char>::size_type)'
   name=max (name,s[j].id.length());
                                  ^
In file included from /usr/include/c++/6/bits/char_traits.h:39:0,
                 from /usr/include/c++/6/ios:40,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from /in/foo.cc:1:
/usr/include/c++/6/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/6/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
/in/foo.cc:24:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type {aka long unsigned int}')
   name=max (name,s[j].id.length());
                                  ^
In file included from /usr/include/c++/6/bits/char_traits.h:39:0,
                 from /usr/include/c++/6/ios:40,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from /in/foo.cc:1:
/usr/include/c++/6/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/6/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
/in/foo.cc:24:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type {aka long unsigned int}')
   name=max (name,s[j].id.length());
                                  ^
In file included from /usr/include/c++/6/algorithm:62:0,
                 from /in/foo.cc:6:
/usr/include/c++/6/bits/stl_algo.h:3459:5: note: candidate: template<class _Tp> _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/6/bits/stl_algo.h:3459:5: note:   template argument deduction/substitution failed:
/in/foo.cc:24:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   name=max (name,s[j].id.length());
                                  ^
In file included from /usr/include/c++/6/algorithm:62:0,
                 from /in/foo.cc:6:
/usr/include/c++/6/bits/stl_algo.h:3465:5: note: candidate: template<class _Tp, class _Compare> _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/6/bits/stl_algo.h:3465:5: note:   template argument deduction/substitution failed:
/in/foo.cc:24:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   name=max (name,s[j].id.length());
                                  ^
/in/foo.cc:28:14: error: 'a' was not declared in this scope
    int t=0,m=a[j].a[i];
              ^
/in/foo.cc:38:18: error: 'stew' was not declared in this scope
   cout<<stew(name)<<s[j].id;
                  ^