纯污染无天然的暴力题，本地过了，为什么评测全wa？

#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll n;
double compute_dis(ll x,ll y,ll a,ll b){
	double ans=sqrt(pow(x-a,2)+pow(y-b,2));
	return ans;
}

int main(){
	scanf("%d",&n);
	vector<ll>x(n+10);
	vector<ll>y(n+10);
	double dis,min_dis=1e12;
	for(ll i=1;i<=n;i++){
		scanf("%d%d",&x[i],&y[i]);
	}
	for(ll i=1;i<=n;i++){
		for(ll j=i+1;j<=n;j++){
			dis=compute_dis(x[i],y[i],x[j],y[j]);
			if(dis<min_dis)	min_dis=dis;
		}
	}
	printf("%.4llf",min_dis);
	return 0;
}

附测试点
p1257_1.in:2 22990 6691 37281 24938
p1257_1.out:23177.2667
系统输出:23177.2667

Process exited after 6.082 seconds with return value 0
请按任意键继续. . .