import java.util.*;
import java.util.Arrays;
import java.util.Scanner;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int [] A = new int[N];
    for(int  i= 0;i<N;i++){
      A[i] = sc.nextInt();
    }
    Arrays.sort(A);
    System.out.println(Math.abs(A[N-1]-A[0]));
  }
}
    

/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