import java.util.*;

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

		String line = sc.nextLine();
		int count = Integer.parseInt(line);

		List<Integer> list = new ArrayList<>();
		String[] array = sc.nextLine().split(" ");
		for (int i = 0; i < count; i++) {
			list.add(Integer.parseInt(array[i]));
		}
		int max = list.stream().max(Comparator.naturalOrder()).get();
		int min = list.stream().min(Comparator.naturalOrder()).get();
	
		System.out.println(max - min);
	}
}

/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