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 = 0;
		int maxNum = 1;
		int minNum = Integer.MAX_VALUE;
		for (int i = 0; i < n; i++) {
			a = sc.nextInt();
			maxNum = Math.max(a, maxNum);
			minNum = Math.min(a, minNum);
		}
		System.out.println(maxNum - minNum);
	}

}

/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