#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int main(){
    int n,temp; 
    scanf("%d",&n);
    int *a = malloc(sizeof(int) * n);
    for(int a_i = 0; a_i < n; a_i++){
       scanf("%d",&a[a_i]);
      }
    // your code goes here
    for(int i=0;i<n-1;i++)
        {
        if(a[i]>a[i+1])
            {
           temp=a[i];
           a[i]=a[i+1];
           a[i+1]=temp;
    }
    }
   int d = n;
   for (int i=0; i<n-1; i++)
      if (a[i+1] - a[i] < d)
          d = a[i+1] - a[i];
          printf("%d",d);
   return 0;
}