Language: C++

#include <iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main(void){
   int n,x;
   cin >> n >> x;
   vector<int> a(n);
   int sum = 0;
   int ans = n - 1;
   for(int i = 0;i < n;i++){
       cin >> a[i];
       sum += a[i];
   }
   sort(a.begin(),a.end,greater<int>());
   if(sum == x){
       cout << n << endl;
   }else if(sum < x){
       cout << n - 1 << endl;
   }else{
       while(sum > x && ans >= 0){
           sum -= a[ans];
           ans--;
       }
       cout << ans << endl;
   }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:8: error: no matching function for call to 'sort(std::vector<int>::iterator, <unresolved overloaded function type>, std::greater<int>)'
   15 |    sort(a.begin(),a.end,greater<int>());
      |    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:3:
/usr/include/c++/14/bits/stl_algo.h:4762:5: note: candidate: 'template<class _RAIter> void std::sort(_RAIter, _RAIter)'
 4762 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4762:5: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/14/bits/stl_algo.h:4793:5: note: candidate: 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<int*, vector<int> >; _Compare = greater<int>]'
 4793 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4793:63: note:   no known conversion for argument 2 from '<unresolved overloaded function type>' to '__gnu_cxx::__normal_iterator<int*, std::vector<int> >'
 4793 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
      |                                         ~~~~~~~~~~~~~~~~~~~~~~^~~~~~
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator, _Compare)'
  292 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note:   candidate expects 4 arguments, 3 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator)'
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/14/pstl/glue_algorithm_defs.h:15:
/usr/include/c++/14/pstl/execution_defs.h: In substitution of 'template<class _ExecPolicy, class _Tp> using __pstl::__internal::__enable_if_execution_policy = typename std::enable_if<__pstl::execution::v1::is_execution_policy<typename std::remove_cv<typename std::remove_reference<_Tp>::type>::type>::value, _Tp>::type [with _ExecPolicy = __gnu_cxx::__normal_iterator<int*, std::vector<int> >; _Tp = void]':
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1:   required by substitution of 'template<class _ExecutionPolicy, class _RandomAccessIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator) [with _ExecutionPolicy = __gnu_cxx::__normal_iterator<int*, std::vector<int> >; _RandomAccessIterator = std::greater<int>]'
a.cc:15:8:   required from here
   15 |    sort(a.begin(),a.end,greater<int>());
      |    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/pstl/execution_defs.h:82:7: error: no type named 'type' in 'struct std::enable_if<false, void>'
   82 | using __enable_if_execution_policy =
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~