Language: C++

#include <bits/stdc++.h>
#include <iostream>
#include <iomanip>
#include <ios> 
#include <vector>
#include <string>
#include <algorithm>
//#include <functional>
#include <queue>
//#include <stack>
//#include <set>
#include <cmath>
//#include <bitset>
#include <map>
using namespace std;
typedef long long ll;

int main() {
  int N,K;
  cin >> N >> K;
  int V[N];
  for(int i=0; i<N; i++){
    cin >> V[i];
  }
  int ans = -1 * INT_MAX;
  for(int i=K; i>=(K/2); i--){
    //    if(i%2 != K%2) continue;
    if(K%2==1 && i==K/2) continue;
    int toru = i - (K-i);
    //    int modosu = K-i;
    int hidari=i;
    int migi=0;
    for(int l=0; l < i; l++){
      int value[i];
      for(int j=0; j<hidari; j++){
	value[j] = V[j];
      }
      for(int j=0; j<migi; j++){
	value[j+hidari] = V[N-1-j];
	//	cout << "migi " << V[N-1-j] << endl;
      }
      sort(value, value+i);
      ll tmp_ans=0;
      //      cout << "toru "<<toru << endl;
      for(int j=0; j < toru; j++){
	tmp_ans += value[i-1-j];
	//		cout << value[i-1-j] << endl;
      }
      hidari--;
      migi++;    
      ans= max(ans, tmp_ans);
    }
  }

  cout << ans << endl;
	       
	       


  return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:51:15: error: no matching function for call to 'max(int&, ll&)'
   51 |       ans= max(ans, tmp_ans);
      |            ~~~^~~~~~~~~~~~~~
In file included 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_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:51:15: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   51 |       ans= max(ans, tmp_ans);
      |            ~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:51:15: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   51 |       ans= max(ans, tmp_ans);
      |            ~~~^~~~~~~~~~~~~~