Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  #define int long
  int N,K,r=0;
  cin>>N>>K;
  if(N==1){
    cout<<1;
    return 0;
  }
  if(!K){
    cout<<N*N;
    return 0;
  }
  for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
  cout<<r;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:30: error: no matching function for call to 'max(long int, int)'
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                           ~~~^~~~~~~~~~~~~~~
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:15:30: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'int')
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                           ~~~^~~~~~~~~~~~~~~
/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:15:30: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                           ~~~^~~~~~~~~~~~~~~
a.cc:15:49: error: no matching function for call to 'max(long int, int)'
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                                              ~~~^~~~~~~~~~~~~~~~~
/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:15:49: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'int')
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                                              ~~~^~~~~~~~~~~~~~~~~
/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:15:49: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   15 |   for(int b=1;b<=N;++b)r+=max((b-K)*(N/b),0)+max(N-(N/b)*b+1-K,0);
      |                                              ~~~^~~~~~~~~~~~~~~~~