import java.util.*;

public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            int n = sc.nextInt();
            int[] st = new int[n];
            for(int i = 0; i < n; i++){
              st[i] = sc.nextInt();
          }
          Arrays.sort(st);
          int a = st[0];
          int b = st[n-1];
          System.out.println(Math.abs(a-b));
}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz