Language: C++

#include<bits/stdc++.h>
using namespace std;
signed maon(){
  vector<pair<string,int> > a;
  string b[1000000],c;
  int d,e;
  cin>>d;
  for(int i=0;i<d;i++){
    cin>>c>>e;
    b[i]=c;
    push_back(make_pair(c,e));
  }
  sort(a.begin(),a.end(),greater<string>());
  for(int i=0;i<d;i++){
    for(int j=0;j<d;j++){
      if(a[i].first==b[j]) cout<<i+1<<"\n";
      
    }
  }
  
}

Compiler output:
a.cc: In function 'int maon()':
a.cc:11:5: error: 'push_back' was not declared in this scope
   11 |     push_back(make_pair(c,e));
      |     ^~~~~~~~~
a.cc:21:1: warning: no return statement in function returning non-void [-Wreturn-type]
   21 | }
      | ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:71,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = __gnu_cxx::__normal_iterator<std::pair<std::__cxx11::basic_string<char>, int>*, std::vector<std::pair<std::__cxx11::basic_string<char>, int> > >; _Iterator2 = __gnu_cxx::__normal_iterator<std::pair<std::__cxx11::basic_string<char>, int>*, std::vector<std::pair<std::__cxx11::basic_string<char>, int> > >; _Compare = std::greater<std::__cxx11::basic_string<char> >]':
/usr/include/c++/14/bits/stl_algo.h:1777:14:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1777 |           if (__comp(__i, __first))
      |               ~~~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1817:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1817 |           std::__insertion_sort(__first, __first + int(_S_threshold), __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1908:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1908 |           std::__final_insertion_sort(__first, __last, __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4805:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = greater<__cxx11::basic_string<char> >]'
 4805 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_comp_iter(__comp));
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:13:7:   required from here
   13 |   sort(a.begin(),a.end(),greater<string>());
      |   ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/predefined_ops.h:158:30: error: no match for call to '(std::greater<std::__cxx11::basic_string<char> >) (std::pair<std::__cxx11::basic_string<char>, int>&, std::pair<std::__cxx11::basic_string<char>, int>&)'
  158 |         { return bool(_M_comp(*__it1, *__it2)); }
      |                       ~~~~~~~^~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:49,
                 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/stl_function.h:394:7: note: candidate: 'constexpr bool std::greater<_Tp>::operator()(const _Tp&, const _Tp&) const [with _Tp = std::__cxx11::basic_string<char>]'
  394 |       operator()(const _Tp& __x, const _Tp& __y) const
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_function.h:394:29: note:   no known conversion for argument 1 from 'std::pair<std::__cxx11::basic_string<char>, int>' to 'const std::__cxx11::basic_string<char>&'
  394 |       operator()(const _Tp& __x, const _Tp& __y) const
      |                  ~~~~~~~~~~~^~~
/usr/include/c++/14/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = std::pair<std::__cxx11::basic_string<char>, int>; _Iterator = __gnu_cxx::__normal_iterator<std::pair<std::__cxx11::basic_string<char>, int>*, std::vector<std::pair<std::__cxx11::basic_string<char>, int> > >; _Compare = std::greater<std::__cxx11::basic_string<char> >]':
/usr/include/c++/14/bits/stl_algo.h:1757:20:   required from 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Val_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1757 |       while (__comp(__val, __next))
      |              ~~~~~~^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1785:36:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1785 |             std::__unguarded_linear_insert(__i,
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
 1786 |                                 __gnu_cxx::__ops::__val_comp_iter(__comp));
      |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1817:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1817 |           std::__insertion_sort(__first, __first + int(_S_threshold), __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1908:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
 1908 |           std::__final_insertion_sort(__first, __last, __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4805:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Compare = greater<__cxx11::basic_string<char> >]'
 4805 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_comp_iter(__comp));
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:13:7:   required from here
   13 |   sort(a.begin(),a.end(),greater<string>());
      |   ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/predefined_ops.h:240:30: error: no match for call to '(std::greater<std::__cxx11::basic_string<char> >) (std::pair<std::__cxx11::basic_string<char>, int>&, std::pair<std::__cxx11::basic_string<char>, int>&)'
  240 |         { return bool(_M_comp(__val, *__it)); }
      |                       ~~~~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_function.h:394:7: note: candidate: 'constexpr bool std::greater<_Tp>::operator()(const _Tp&, const _Tp&) const [with _Tp = std::__cxx11::basic_string<char>]'
  394 |       operator()(const _Tp& __x, const _Tp& __y) const
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_function.h:394:29: note:   no known conversion for argument 1 from 'std::pair<std::__cxx11::basic_string<char>, int>' to 'const std::__cxx11::basic_string<char>&'
  394 |       operator()(const _Tp& __x, const _Tp& __y) const
      |                  ~~~~~~~~~~~^~~
/usr/include/c++/14/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<std::__cxx11::basic_string<char>, int>*, std::vector<std::pair<std::__cxx11::basic_string<char>, int> > >; _Value = std::pair<std::__cxx11::basic_string<char>, int>; _Compare = std::greater<std::__cxx11::basic_string<char> >]':
/usr/include/c++/14/bits/stl_heap.h:140:48:   required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Distance = long int; _Tp = pair<__cxx11::basic_string<char>, int>; _Compare = __gnu_cxx::__ops::_Iter_comp_val<greater<__cxx11::basic_string<char> > >]'
  140 |       while (__holeIndex > __topIndex && __comp(__first + __parent, __value))
      |                                          ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_heap.h:247:23:   required from 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<__cxx11::basic_string<char>, int>*, vector<pair<__cxx11::basic_string<char>, int> > >; _Distance = long int; _Tp = pair<__cxx11::basic_string<char>, int>; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<greater<__cxx11::basic_string<char> > >]'
  247 |       std::__push_heap(__first, __holeIndex, __topIndex,
      |       ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  248 |                        _GLIBCXX_MOVE(__value), __cmp);
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_heap.h:356:22:   required from 'voi