Language: C++

#include <iostream>
#include <list>
#include <algorithm>
#include <functional>
using namespace std;

int main(){
    int n,m;
    cin >> n >> m;
    list<int> a(n);

    for(int i = 0; i < n; i++){
        cin >> a[i];
    }
    
    int p = 0;
    for(int i = 0; i < m; i++){
        a[n-1] = a[n-1]>>1;
        if(a[n-1] < a[n-2]){
            sort(a.begin(),a.end());
        }
    }
    long sum = 0;
    for(int i = 0; i < n; i++){
        sum += (long)a[i];
    }
    cout << sum;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   13 |         cin >> a[i];
      |                 ^
a.cc:18:10: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   18 |         a[n-1] = a[n-1]>>1;
      |          ^
a.cc:18:19: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   18 |         a[n-1] = a[n-1]>>1;
      |                   ^
a.cc:19:13: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   19 |         if(a[n-1] < a[n-2]){
      |             ^
a.cc:19:22: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   19 |         if(a[n-1] < a[n-2]){
      |                      ^
a.cc:25:23: error: no match for 'operator[]' (operand types are 'std::__cxx11::list<int>' and 'int')
   25 |         sum += (long)a[i];
      |                       ^
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:3:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = _List_iterator<int>; _Compare = __gnu_cxx::__ops::_Iter_less_iter]':
/usr/include/c++/14/bits/stl_algo.h:4772:18:   required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = _List_iterator<int>]'
 4772 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:20:17:   required from here
   20 |             sort(a.begin(),a.end());
      |             ~~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1906:50: error: no match for 'operator-' (operand types are 'std::_List_iterator<int>' and 'std::_List_iterator<int>')
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/string:48,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:
/usr/include/c++/14/bits/stl_algo.h:1906:50: note:   'std::_List_iterator<int>' is not derived from 'const std::reverse_iterator<_Iterator>'
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~
/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:
/usr/include/c++/14/bits/stl_algo.h:1906:50: note:   'std::_List_iterator<int>' is not derived from 'const std::move_iterator<_IteratorL>'
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                           ~~~~~~~^~~~~~~~~