Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#define int long long
using namespace std;
int n, k, a[100], ans;
signed main() {
	cin >> n >> k;
	for (int i = 0; i < n; i++)cin >> a[i];
	for (int i = 0; i < min(n, k); i++) {
		for (int j = 0; i + j < min(n, k); j++) {
			vector<int>v; int sum = 0;
			for (int p = 0; p < i; p++) {
				v.push_back(a[p]); sum += a[p];
			}
			for (int p = 0; p < j; p++) {
				v.push_back(a[n - p - 1]); sum += a[n - p - 1];
			}
			sort(v.begin(), v.end());
			for (int p = 0; p < min(k - i - j, i + j); p++)sum -= min(v[p], 0);
			ans = max(ans, sum);
		}
	}
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:82: error: no matching function for call to 'min(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&, int)'
   20 |                         for (int p = 0; p < min(k - i - j, i + j); p++)sum -= min(v[p], 0);
      |                                                                               ~~~^~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 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_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:20:82: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   20 |                         for (int p = 0; p < min(k - i - j, i + j); p++)sum -= min(v[p], 0);
      |                                                                               ~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:20:82: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   20 |                         for (int p = 0; p < min(k - i - j, i + j); p++)sum -= min(v[p], 0);
      |                                                                               ~~~^~~~~~~~~