Language: C++

#include <bits/stdc++.h>
#define INF 10000000000000007
using namespace std;

int main() {
    int n, k;
    cin >> n >> k;
    long a[n];
    for (int i = 0; i < n; i++)
        cin >> a[i];

    long acc[n + 1];
    acc[0] = 0;
    for (int i = 1; i <= n; i++) {
        acc[i] = acc[i - 1] + a[i - 1];
    }

    long max_acc = 0;
    int index = 0;
    for (int i = k; i <= n; i++) {
        if (max_acc < acc[i] - acc[i - k]) {
            max_acc = acc[i] - acc[i - k];
            index = i - k;
        }
    }
    long ans = 0;
    if (max_acc == 0) {
        long min_acc = INF;
        acc[0] = 0;
        for (int i = 1; i <= n; i++) {
            acc[i] = acc[i - 1] + max(0, a[i - 1]);
        }
        for (int i = k; i <= n; i++) {
            if (min_acc > acc[i] - acc[i - k]) {
                min_acc = acc[i] - acc[i - k];
                index = i - k;
            }
        }
    } else {
        ans = max_acc;
    }
    for (int i = 0; i < k; i++) {
        a[i + index] = 0;
    }

    for (int i = 0; i < n; i++) {
        if (a[i] > 0)
            ans += a[i];
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:38: error: no matching function for call to 'max(int, long int&)'
   31 |             acc[i] = acc[i - 1] + max(0, a[i - 1]);
      |                                   ~~~^~~~~~~~~~~~~
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:31:38: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long int')
   31 |             acc[i] = acc[i - 1] + max(0, a[i - 1]);
      |                                   ~~~^~~~~~~~~~~~~
/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:31:38: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   31 |             acc[i] = acc[i - 1] + max(0, a[i - 1]);
      |                                   ~~~^~~~~~~~~~~~~