Language: C++

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

# define NMAX 1000000001

// void change(int b, int c, std::vector<int> &seq){
//     for(int i=0; i < b; i++){
//         if(seq.at(i) < c){
//             seq.at(i) = c;
//         }else{
//             return;
//         }
//     }
// }
//
// void map_change(){
//
// }

int main(){
    int N, M;
    cin >> N >> M;
    std::vector<int> seq(N);
    for(int i=0; i < N; i++){
        cin >> seq.at(i);
    }
    vector<std::vector<int> > ope(M, vector<int>(2));
    std::map<int, int> ope_map;
    // for(int i=0; i < M; i++){
    //     cin >> ope.at(i).at(0) >> ope.at(i).at(1);
    // }
    int a, b;
    for(int i=0; i < M; i++){
        cin >> a >> b;
        if(ope_map.count(b)){
            ope_map[b] += a;
        }else{
            ope_map[b] = a;
        }

    }
    sort(seq.begin(), seq.end());
    std::vector<int> ope_seq(N, 0);
    int pointer = 0;
    for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
        int len = pointer + iter->second;
        for(int i=pointer; i < len; i++){
            ope_seq.at(i) = iter->first;
            pointer ++;
            if(pointer >= N){
                break;
            }
        }
        if(pointer >= N){
            break;
        }
    }
    sort(ope_seq.begin(), ope_seq.end());
    // for(int i=0; i < N; i++){
    //     cout << seq.at(i) << " ";
    // }
    // cout << endl;
    // for(int i=0; i < N; i++){
    //     cout << ope_seq.at(i) << " ";
    // }
    // cout << endl;
    std::vector<int>::iterator iter_ope = ope_seq.end() - 1;
    std::vector<int>::iterator iter_seq = seq.end() - 1;
    long sum = 0;
    for(int i=0; i < N; i++){
        if(*iter_ope > *iter_seq){
            sum += *iter_ope;
            iter_ope --;
        }else{
            sum += *iter_seq;
            iter_seq --;
        }
    }


    // for(int i=0; i < M; i++){
    //     change(ope.at(i).at(0), ope.at(i).at(1), seq);
    // }
    // long sum = accumulate(seq.begin(), seq.end(), 0);
    cout << sum << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:45:55: error: no match for 'operator-' (operand types are 'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} and 'int')
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                         ~~~~~~~~~~~~~ ^ ~
      |                                                    |    |
      |                                                    |    int
      |                                                    std::map<int, int>::iterator {aka std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator}
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 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/stl_iterator.h:618:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  618 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::reverse_iterator<_Iterator>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1790 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::move_iterator<_IteratorL>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:370:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)'
  370 |     operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:370:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::complex<_Tp>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/complex:379:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)'
  379 |     operator-(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:379:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::complex<_Tp>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/complex:388:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)'
  388 |     operator-(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:388:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/complex:465:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&)'
  465 |     operator-(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:465:5: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   45 |     for (map<int, int>::iterator iter = ope_map.end() - 1; iter != ope_map.begin(); --iter){
      |                                                         ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:45:57: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   45 |     for (map<int, int>::iterator iter = ope_map.en