import java.util.*;
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();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
}

/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