Language: C++

#include<bits/stdc++.h>
#define S second
#define F first
#define ll long long
using namespace std;
main(){
    ll n,k;
    cin >> n >> k;
    ll ans=0;
    for (ll b = k +1; b <= n; b++){
        ll L = (n - b +1)-(n - b +1)%b + b;
        ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,k);
    }
    cout << ans << endl;
}


Compiler output:
a.cc:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:12:63: error: no matching function for call to 'max(int, long long int)'
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,k);
      |                                                            ~~~^~~~~~~~~~~~~~~~~
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:12:63: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,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:
/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:12:63: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,k);
      |                                                            ~~~^~~~~~~~~~~~~~~~~
a.cc:12:107: error: no matching function for call to 'max(int, long long int&)'
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,k);
      |                                                                                                        ~~~^~~~~
/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:12:107: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,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
/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:12:107: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   12 |         ans += min(-k+b,L  -(n - b + 1) )*((n - b + 1)/b)+(max(0,n - k - L + 1))*((n - b + 1)/b + 1)+b-max(1,k);
      |                                                                                                        ~~~^~~~~