import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int  min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;

        for (int i = 0; i < N; ++i) {
            int x = in.nextInt();
            min = Math.min(min, x);
            max = Math.max(max, x);
        }

        System.out.println(Math.abs(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