import java.util.Scanner; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int[] x = new int[n]; for(int i=0; i<n; i++) { x[i] = in.nextInt(); } Arrays.sort(x); if(n == 1) { System.out.println(0); } else { int len = Integer.MAX_VALUE; for(int i=1; i<n; i++) { if(x[i] != x[i-1]) { len = Math.min(len, Math.abs(x[i] - x[i-1])); } } if(len == Integer.MAX_VALUE) { System.out.println(0); } else { System.out.println(len); } } in.close(); } }