import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    }
    System.out.println(max - min);
  }
}
/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