测试点信息 3ms/564.00KB AC #1 Accepted, 得分 20.ok accepted

4ms/676.00KB AC #2 Accepted, 得分 20.ok accepted

4ms/564.00KB AC #3 Accepted, 得分 20.ok accepted

0ms/0B RE #4 Runtime Error. Received signal 11: Segmentation fault with invalid memory reference.

5ms/556.00KB AC #5 Accepted, 得分 20.ok accepted

只有80分，第四个测试点RE。

#include<bits/stdc++.h>
using namespace std;
struct apple{
	int high;
	int strength;
	bool flag=false;
}l[5001];
bool cmp(apple x,apple y){
	return x.strength<y.strength;
}
int main(){
	int n,s,b,a,i,ans=0;
	cin>>n>>s>>a>>b;
	int most=a+b;
	for(i=1;i<=n;i++){
		cin>>l[i].high>>l[i].strength;
		if(l[i].high<=most)
		l[i].flag=true;
	}
	sort(l+1,l+n+1,cmp);
	i=1;
	while(s-l[i].strength>=0){
		if(l[i].flag==true){
			ans++;
		s-=l[i].strength;
		}
		i++;
	}
	cout<<ans;
	return 0;
}