Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int a,b;
  int value=0;
  cin >> a;
  vector<string,int> mp;
  for(int i=0;i<a;i++){
    string t;  cin >>t;
    mp[t]++;
  }
  cin >>b;
  for(int i=0;i<b;i++){
    strin t; cin >>t;
    mp[t]--;
  }
  for(auto t:mp){
    value =max(max,t.second);
  }
  cout <<value <<endl;
}


Compiler output:
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h: In instantiation of 'struct std::_Vector_base<std::__cxx11::basic_string<char>, int>':
/usr/include/c++/14/bits/stl_vector.h:428:11:   required from 'class std::vector<std::__cxx11::basic_string<char>, int>'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
a.cc:8:22:   required from here
    8 |   vector<string,int> mp;
      |                      ^~
/usr/include/c++/14/bits/stl_vector.h:87:28: error: 'int' is not a class, struct, or union type
   87 |         rebind<_Tp>::other _Tp_alloc_type;
      |                            ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:89:9: error: 'int' is not a class, struct, or union type
   89 |         pointer;
      |         ^~~~~~~
/usr/include/c++/14/bits/stl_vector.h: In instantiation of 'class std::vector<std::__cxx11::basic_string<char>, int>':
a.cc:8:22:   required from here
    8 |   vector<string,int> mp;
      |                      ^~
/usr/include/c++/14/bits/stl_vector.h:518:20: error: '_M_allocate' has not been declared in 'std::vector<std::__cxx11::basic_string<char>, int>::_Base'
  518 |       using _Base::_M_allocate;
      |                    ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:519:20: error: '_M_deallocate' has not been declared in 'std::vector<std::__cxx11::basic_string<char>, int>::_Base'
  519 |       using _Base::_M_deallocate;
      |                    ^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:521:20: error: '_M_get_Tp_allocator' has not been declared in 'std::vector<std::__cxx11::basic_string<char>, int>::_Base'
  521 |       using _Base::_M_get_Tp_allocator;
      |                    ^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:33:
/usr/include/c++/14/bits/stl_vector.h: In instantiation of 'std::_Vector_base<_Tp, _Alloc>::_Vector_impl::_Vector_impl() [with _Tp = std::__cxx11::basic_string<char>; _Alloc = int]':
a.cc:8:22:   required from here
    8 |   vector<string,int> mp;
      |                      ^~
/usr/include/c++/14/bits/stl_vector.h:136:24: error: 'int' is not a class, struct, or union type
  136 |         _Vector_impl() _GLIBCXX_NOEXCEPT_IF(
      |                        ^~~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:11:7: error: no match for 'operator[]' (operand types are 'std::vector<std::__cxx11::basic_string<char>, int>' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   11 |     mp[t]++;
      |       ^
a.cc:15:5: error: 'strin' was not declared in this scope; did you mean 'stdin'?
   15 |     strin t; cin >>t;
      |     ^~~~~
      |     stdin
a.cc:15:20: error: 't' was not declared in this scope
   15 |     strin t; cin >>t;
      |                    ^
a.cc:18:14: error: no matching function for call to 'begin(std::vector<std::__cxx11::basic_string<char>, int>&)'
   18 |   for(auto t:mp){
      |              ^~
In file included from /usr/include/c++/14/bits/algorithmfwd.h:39,
                 from /usr/include/c++/14/bits/stl_algo.h:59,
                 from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/initializer_list:88:5: note: candidate: 'template<class _Tp> constexpr const _Tp* std::begin(initializer_list<_Tp>)'
   88 |     begin(initializer_list<_Tp> __ils) noexcept
      |     ^~~~~
/usr/include/c++/14/initializer_list:88:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   'std::vector<std::__cxx11::basic_string<char>, int>' is not derived from 'std::initializer_list<_Tp>'
   18 |   for(auto t:mp){
      |              ^~
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/range_access.h:52:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(_Container&)'
   52 |     begin(_Container& __cont) -> decltype(__cont.begin())
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:52:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(_Container&) [with _Container = std::vector<std::__cxx11::basic_string<char>, int>]':
a.cc:18:14:   required from here
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/bits/range_access.h:52:50: error: 'class std::vector<std::__cxx11::basic_string<char>, int>' has no member named 'begin'
   52 |     begin(_Container& __cont) -> decltype(__cont.begin())
      |                                           ~~~~~~~^~~~~
/usr/include/c++/14/bits/range_access.h:63:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(const _Container&)'
   63 |     begin(const _Container& __cont) -> decltype(__cont.begin())
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:63:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(const _Container&) [with _Container = std::vector<std::__cxx11::basic_string<char>, int>]':
a.cc:18:14:   required from here
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/bits/range_access.h:63:56: error: 'const class std::vector<std::__cxx11::basic_string<char>, int>' has no member named 'begin'
   63 |     begin(const _Container& __cont) -> decltype(__cont.begin())
      |                                                 ~~~~~~~^~~~~
/usr/include/c++/14/bits/range_access.h:95:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::begin(_Tp (&)[_Nm])'
   95 |     begin(_Tp (&__arr)[_Nm]) noexcept
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:95:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   mismatched types '_Tp [_Nm]' and 'std::vector<std::__cxx11::basic_string<char>, int>'
   18 |   for(auto t:mp){
      |              ^~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/valarray:1227:5: note: candidate: 'template<class _Tp> _Tp* std::begin(valarray<_Tp>&)'
 1227 |     begin(valarray<_Tp>& __va) noexcept
      |     ^~~~~
/usr/include/c++/14/valarray:1227:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   'std::vector<std::__cxx11::basic_string<char>, int>' is not derived from 'std::valarray<_Tp>'
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/valarray:1238:5: note: candidate: 'template<class _Tp> const _Tp* std::begin(const valarray<_Tp>&)'
 1238 |     begin(const valarray<_Tp>& __va) noexcept
      |     ^~~~~
/usr/include/c++/14/valarray:1238:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   'std::vector<std::__cxx11::basic_string<char>, int>' is not derived from 'const std::valarray<_Tp>'
   18 |   for(auto t:mp){
      |              ^~
a.cc:18:14: error: no matching function for call to 'end(std::vector<std::__cxx11::basic_string<char>, int>&)'
/usr/include/c++/14/initializer_list:99:5: note: candidate: 'template<class _Tp> constexpr const _Tp* std::end(initializer_list<_Tp>)'
   99 |     end(initializer_list<_Tp> __ils) noexcept
      |     ^~~
/usr/include/c++/14/initializer_list:99:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   'std::vector<std::__cxx11::basic_string<char>, int>' is not derived from 'std::initializer_list<_Tp>'
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/bits/range_access.h:74:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(_Container&)'
   74 |     end(_Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:74:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.end()) std::end(_Container&) [with _Container = std::vector<std::__cxx11::basic_string<char>, int>]':
a.cc:18:14:   required from here
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/bits/range_access.h:74:48: error: 'class std::vector<std::__cxx11::basic_string<char>, int>' has no member named 'end'
   74 |     end(_Container& __cont) -> decltype(__cont.end())
      |                                         ~~~~~~~^~~
/usr/include/c++/14/bits/range_access.h:85:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(const _Container&)'
   85 |     end(const _Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:85:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.end()) std::end(const _Container&) [with _Container = std::vector<std::__cxx11::basic_string<char>, int>]':
a.cc:18:14:   required from here
   18 |   for(auto t:mp){
      |              ^~
/usr/include/c++/14/bits/range_access.h:85:54: error: 'const class std::vector<std::__cxx11::basic_string<char>, int>' has no member named 'end'
   85 |     end(const _Container& __cont) -> decltype(__cont.end())
      |                                               ~~~~~~~^~~
/usr/include/c++/14/bits/range_access.h:106:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::end(_Tp (&)[_Nm])'
  106 |     end(_Tp (&__arr)[_Nm]) noexcept
      |     ^~~
/usr/include/c++/14/bits/range_access.h:106:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   mismatched types '_Tp [_Nm]' and 'std::vector<std::__cxx11::basic_string<