import java.util.Scanner;

public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int min = 1 << 30;
    int max = 0;
    for (int i = 0; i < n; ++i) {
      int a = sc.nextInt();
      min = Math.min(min, a);
      max = Math.max(max, a);
    }

    System.out.println(max - min);
    
    sc.close(); 
  }
}

/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