#include <algorithm>
#include <cmath>
#include <fstream>
#include <iostream>
#include <vector>
#include <iomanip>

using namespace std;

ifstream in("cmap.in");
ofstream out("cmap.out");

int n;
vector <pair<int,int > > v;

double min(double x,double y){
	if(x<y)
		return x;
	return y;
}


int main(){
	int i,x,y;
	in>>n;
	for(i=1;i<=n;++i){
		in>>x>>y;
		v.push_back(make_pair(x,y));
	}
	sort(v.begin(),v.end());
	double result= 1000000000,aux;
	int j;
	for(i=0;i<n;++i){
		for(j=i+1;j<n&&j<=i+8;++j){
			aux=sqrt(double(pow((double)(v[i].first-v[j].first),double(2)))+double(pow((double)(v[i].second-v[j].second),double(2))));
			result=min(result,aux);
		}
	}
	out<<fixed<<setprecision(6)<<result;
	return 0;
}