Language: C++

#include <bits/stdc++.h>
 
using namespace std;
 
#define lli long long int
#define MOD 1000000007
#define DEBUG 1
#define REP(i,n) for(int i=0;i<n;i++)
#define REP2(i,n) for(lli i=1;i<=n;i++)
 
lli lastNum(lli num,lli a,lli b){
	return num/b+a;
}

int main(){

	lli n,m;
	cin>>n>>m;

	lli ans=0;
	for(lli b=m+1;b<=n;b++){
		lli p = n/b;
		lli r = n%b;
		ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
	}
	cout<<ans<<endl;
 
	return 0;
}
 

Compiler output:
a.cc: In function 'int main()':
a.cc:24:31: error: no matching function for call to 'max(int, long long int)'
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                            ~~~^~~~~~~
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:24:31: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                            ~~~^~~~~~~
/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:24:31: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                            ~~~^~~~~~~
a.cc:24:44: error: no matching function for call to 'max(int, long long int)'
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                                         ~~~^~~~~~~~~
/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:24:44: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                                         ~~~^~~~~~~~~
/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:24:44: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                                         ~~~^~~~~~~~~
a.cc:24:57: error: 'k' was not declared in this scope
   24 |                 ans += p * max(0,b-m) + max(0,r-m+1) - (k==0?1:0);
      |                                                         ^