Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    int N, K; cin >> N >> K;

    if(K==0){
        cout << N * N << endl;
        return 0;
    }

    ll cnt = 0;
    for (int i = 1; i <= N; i++)
    {
        int p = N/i;
        int q = N%i;
        cnt += max(0LL, i-K) * p + max(0LL, q-K+1);
    }
    cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:19: error: no matching function for call to 'max(long long int, int)'
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+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:18:19: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+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:18:19: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+1);
      |                ~~~^~~~~~~~~~
a.cc:18:39: error: no matching function for call to 'max(long long int, int)'
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+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:18:39: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+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
/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:18:39: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   18 |         cnt += max(0LL, i-K) * p + max(0LL, q-K+1);
      |                                    ~~~^~~~~~~~~~~~