Language: C++

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <map>
#include <string>
#include <vector>
#include <cmath>
#include <random>
#include <climits>
#include <set>
#include <deque>
#include <queue>
#include <bitset>
#include <stack>

#define mod 1000000007
#define INF2 9999999999
#define INF (1<<30)
#define rep(i,n) for(int (i)=0; (i)<(n); (i)++)
#define P pair<int, int>

using namespace std;
using ll = long long;

int dx[] = {1, 0, -1, 0};
int dy[] = {0, 1, 0, -1};
int DX[] = {1, 1, 0, -1, -1, -1, 0, 1};
int DY[] = {0, -1, -1, -1, 0, 1, 1, 1};

struct edge {int from, to, cost; };

void solve(){
    ll n, k, c=0;
    cin >> n >> k;
    if(k == 0){
        cout << n*n << endl;
        return;
    }
    for(int i = k; i <= n; i++){
        c += (n/i) * max(0, i-k);
        c += max(0, n%i-k+1); 
    }
    cout << c << endl;
}

int main(){
    solve();
    return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:40:25: error: no matching function for call to 'max(int, ll)'
   40 |         c += (n/i) * max(0, i-k);
      |                      ~~~^~~~~~~~
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:40:25: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   40 |         c += (n/i) * max(0, i-k);
      |                      ~~~^~~~~~~~
/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:40:25: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   40 |         c += (n/i) * max(0, i-k);
      |                      ~~~^~~~~~~~
a.cc:41:17: error: no matching function for call to 'max(int, ll)'
   41 |         c += 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:41:17: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   41 |         c += 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:41:17: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   41 |         c += max(0, n%i-k+1);
      |              ~~~^~~~~~~~~~~~