import java.io.IOException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int min = 1_000_000_000;
		int max = 1;

		for (int i = 0; i < n; i++) {
			int tmp = sc.nextInt();
			if (tmp < min)
				min = tmp;
			if (tmp > max)
				max = tmp;
		}

		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