Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <fstream>
#include <set>
#include <cmath>
#include <array>
#include <iomanip>
#include <cassert>

using namespace std;

int main(void) {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k;
    cin >> n >> k;

    std::vector<int64_t> sums(n);
    std::vector<int64_t> pos(n);

    for (int i = 0; i < n; i++) {
        int64_t x;
        cin >> x;
        sums[i] = x + (i > 0 ? sums[i - 1] : 0LL);
        pos[i] = max(x, 0LL) + (i > 0 ? pos[i - 1]: 0LL);
    }

    auto get_value = [&](auto& v, int l, int r) {
        if (l == 0) {
            return v[r];
        }
        return v[r] - v[l - 1];
    };

    int64_t answer = 0;
    for (int i = 0; i < n; i++) {
        if (i >= k - 1) {
            auto pos_sum = get_value(pos, i - k + 1, i);
            auto sum_sum = get_value(sums, i - k + 1, i);

            answer = max(answer, pos.back() - pos_sum + max(sum_sum, 0LL));
        }
    }
    cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:21: error: no matching function for call to 'max(int64_t&, long long int)'
   29 |         pos[i] = max(x, 0LL) + (i > 0 ? pos[i - 1]: 0LL);
      |                  ~~~^~~~~~~~
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:29:21: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'long long int')
   29 |         pos[i] = max(x, 0LL) + (i > 0 ? pos[i - 1]: 0LL);
      |                  ~~~^~~~~~~~
/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:29:21: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   29 |         pos[i] = max(x, 0LL) + (i > 0 ? pos[i - 1]: 0LL);
      |                  ~~~^~~~~~~~
a.cc:45:60: error: no matching function for call to 'max(long int&, long long int)'
   45 |             answer = max(answer, pos.back() - pos_sum + max(sum_sum, 0LL));
      |                                                         ~~~^~~~~~~~~~~~~~
/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:45:60: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'long long int')
   45 |             answer = max(answer, pos.back() - pos_sum + max(sum_sum, 0LL));
      |                                                         ~~~^~~~~~~~~~~~~~
/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
/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:45:60: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   45 |             answer = max(answer, pos.back() - pos_sum + max(sum_sum, 0LL));
      |                                                         ~~~^~~~~~~~~~~~~~