Language: C++

#include <bits/stdc++.h>
using namespace std;
#define pie 3.141592653589793238462643383279
#define mod 1000000007
#define INF LLONG_MAX/5
#define all(v) v.begin(),v.end()
#define P pair<int,int>
#define S second
#define F first
#define f(i,n) for(int i=0;i<n;i++)
#define int long long
int x[100000],vx[100000];
signed main(){
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	f(i,a)cin>>x[i];
	sort(x,x+a);
	f(i,a){
		if(i)vx[i]+=vx[i-1];
		vx[i]+=x[i];
	}
	int l=-1,r=1000000000;
	while(r-l>1){
		int z=(l+r)/2;
		bool bo=true;
		if(x[a-d]-z>b)bo=false;
		z+=b;
		auto a1=lower_bound(x,x+a,z),a2=lower_bound(x,x+a,z-b);
		if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
		if(bo)r=z-b;
		else l=z-b;
	}
	cout<<a-(lower_bound(x,x+a,r)-x)<<endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:81: error: no matching function for call to 'max(long long int, long int)'
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                              ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:29:81: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                              ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:29:81: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                              ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:29:125: error: no matching function for call to 'max(long long int, long int)'
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                                                                          ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:29:125: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                                                                          ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:29:125: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   29 |                 if(b*c>((a1-a2)*z-vx[a1-x-1]+vx[a2-x-1]+(a2-x)*b+(vx[a-1]-vx[max(a-d,upper_bound(x,x+a,z)-x-1)]-(z-b)*(a-max(a-d,upper_bound(x,x+a,z)-x)))))bo=false;
      |                                                                                                                          ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~