60分并且有编译问题

#include<bits/stdc++.h>
using namespace std;

int n,b,a,s,ans;

struct apple{
	
	int high;
	
	int st;
	
}ap[50010];

bool cmp(apple m,apple n){
	
	return m.st<n.st;
	
}


int main(){
	
	cin>>n>>s>>a>>b;
	
	int all=a+b;
	
	for(int i=1;i<=n;i++)
		cin>>ap[i].high>>ap[i].st;
		
	sort(ap+1,ap+n+1,cmp);
	
	for(int i=1;i<=n;i++){
		
		if(all>ap[i].high && s>=ap[i].st) ans++,s-=ap[i].st;
		
	}
	
	cout<<ans;
	
	return 0;
}