import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        String[] line = scanner.nextLine().split(" ", n);

        long[] nums = new long[n];
        for (int i = 0; i < n; i++) {
            nums[i] = Long.parseLong(line[i]);
        }
        Arrays.sort(nums);

        System.out.println(nums[n - 1] - nums[0]);
    }
}

/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