为啥CE,本地样例都对

#include<bits/stdc++.h>
using namespace std;
struct Node{
	int d1,d2;	
}a[1000010];
bool cmp(Node i,Node j){
	return i.d1<j.d1;
}
int n,x1,y1,x2,y2,f[1000010];
int main(){
	cin>>x1>>y1>>x2>>y2;
	cin>>n;
	for(int i=1;i<=n;i++){
		int x,y;
		cin>>x>>y;
		a[i].d1=(x-x1)*(x-x1)+(y-y1)*(y-y1);
		a[i].d2=(x-x2)*(x-x2)+(y-y2)*(y-y2);
	}
	sort(a+1,a+n+1,cmp);
	f[n+1]=0;
	for(int i=n;i>=1;i--){
		f[i]=max(f[i+1],a[i].d2);
	}
	int ans=INT_MAX;
	for(int i=0;i<=n;i++){
		ans=min(ans,a[i].d1+f[i+1]);
	}
	cout<<ans;
	return 0;
}