#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
    FILE *read = fopen("cmap.in", "r");
    FILE *write = fopen("cmap.out", "w");

    int n, a[100000], b[100000];
    float z, min = 9999;
    fscanf(read, "%d", &n);
    for(int i = 0; i < n; i++)
        fscanf(read, "%d %d", &a[i], &b[i]);
    for(int i = 0; i < n - 1; i++)
    {
        for(int j = i + 1; j < n; j++)
        {
            z = sqrt((a[j] - a[i]) * (a[j] - a[i]) + (b[j] - b[i]) * (b[j] - b[i]));
            if(z < min) min = z;
        }
    }
    fprintf(write, "%f", min);

    fclose(read);
    fclose(write);
    return 0;
}