#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+7;++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;
}