import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int[] a = new int[n]; for(int a_i=0; a_i < n; a_i++){ a[a_i] = in.nextInt(); } // your code goes here //sorting the array Arrays.sort(a); int min_diff = Math.abs(a[0]- a[1]); int diff = 0; for (int i = 1; i<=n-2;i++) { diff = Math.abs((a[i] - a[i+1])); if ( diff < min_diff) min_diff = diff; } System.out.println(min_diff); } }