Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
typedef long long ll;

int main() {
    ll N, K, ans = 0; cin >> N >> K;
    for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - K +1);
    if (K == 0) ans -= N;
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: no matching function for call to 'max(ll, int)'
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - 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:9:50: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - 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:9:50: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - K +1);
      |                                               ~~~^~~~~~~~
a.cc:9:64: error: no matching function for call to 'max(int, ll)'
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - 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:9:64: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - 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:9:64: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
    9 |     for (int i = 1; i <= N; i++) ans += N/i * max(i-K, 0) + max(0, N%i - K +1);
      |                                                             ~~~^~~~~~~~~~~~~~~