#include <fstream>
#include <math.h>
#include <iostream>
using namespace std;
unsigned long n;
float m[100001][2];
float formula(unsigned long i)
{
    unsigned long j;
    float x,y,min;
    x=m[i][1]-m[i+1][1];
    y=m[i][2]-m[i+1][2];
    x=sqrt(pow(x,2)+pow(y,2));
    min=x;
    for(j=i+2;j<=n;j++)
    {
        x=m[i][1]-m[j][1];
        y=m[i][2]-m[j][2];
        x=sqrt(pow(x,2)+pow(y,2));
        if(x<min)
            min=x;
    }
    return min;
}
int main()
{
    ifstream f("cmap.in");
    ofstream g("cmap.out");
    unsigned long i;
    float x,min=0;
    f>>n;
    for(i=1;i<=n;i++)
        f>>m[i][1]>>m[i][2];
    min=formula(1);
    for(i=2;i<=n;i++)
    {
        x=formula(i);
        if(x<min)
            min=x;
    }
    g<<min;
    return 0;
}