#include <iostream>
#include <cstdio>
#include <iomanip>
#include <cmath>
#include <cstring>
#include <algorithm>
#include <vector>
using namespace std;
int total=0;
int main(){
	freopen("missile2.in","r",stdin);
	freopen("missile2.out","w",stdout);
	long long x1, y1, x2, y2, r1=0, r2=0;
	cin>>x1>>y1>>x2>>y2;
	long long n;
	cin>>n;
	long long a[n+1],b[n+1];
	for(int i=1;i<=n;i++){
		cin>>a[i]>>b[i];
		long long l1=abs(x1-a[i])*abs(x1-a[i])+abs(y1-b[i])*abs(y1-b[i]), l2=abs(x2-a[i])*abs(x2-a[i])+abs(y2-b[i])*abs(y2-b[i]);
		if(r1<l1 && r2<l2){
			int d1=l1+r2, d2=r1+l2;
			if(d1>d2){
				r2=l2;
			}else{
				r1=l1;
			}
		} 
	}
	cout<<r1+r2;
	return 0;
}