import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int max = Integer.MIN_VALUE;
		int min = Integer.MAX_VALUE;
		for (int i=0; i<n; i++) {
			int val = scan.nextInt();
			if (val>max) {
				max=val;
			}
			if (val<min) {
				min=val;
			}
		}
		System.out.println(max-min);
		scan.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