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 Arrays.sort(a); int min = Integer.MAX_VALUE; for (int i = 1; i < a.length; i++){ if (a[i] - a[i - 1] < min) min = a[i] - a[i - 1]; } System.out.println(min); } }