Language: C++

#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <utility>
#include <cstring>
#include <iomanip>
#include <numeric>
#include <cmath>
#include <cassert>
#include <deque>
#include <queue>
using namespace std;
using ll = long long;
const ll INF = 1<<30;
const ll MOD = 1e9 + 7;
signed main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n, k;
    cin >> n >> k;
    vector<ll> v(n);
    for(ll i = 0; i < n; i++) cin >> v[i];
    ll r = min(n, k);
    ll ans = 0;
    for(ll left = 0; left <= r; left++)
    {
        for(ll right = 0; right <= r; right++)
        {
            if(left + right > r) continue;
            vector<ll> J;
            for(ll i = 0; i < left; i++) J.push_back(v[i]);
            for(ll i = 0; i < right; i++) J.push_back(v[n - i -1]);
            sort(J.begin(), J.end());
            ll c = r - (left + right);
            for(ll i = 0; i < min(c, (ll)J.size()); i++) J[i] = max(J[i], 0);
            ll sum = 0;
            for(ll i = 0; i < J.size(); i++) sum += J[i];
            ans = max(ans, sum);
        }
    }
    cout << ans << endl;
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:38:68: error: no matching function for call to 'max(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&, int)'
   38 |             for(ll i = 0; i < min(c, (ll)J.size()); i++) J[i] = max(J[i], 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: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:38:68: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   38 |             for(ll i = 0; i < min(c, (ll)J.size()); i++) J[i] = max(J[i], 0);
      |                                                                 ~~~^~~~~~~~~
/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,
                 from a.cc:3:
/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:38:68: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   38 |             for(ll i = 0; i < min(c, (ll)J.size()); i++) J[i] = max(J[i], 0);
      |                                                                 ~~~^~~~~~~~~