
import java.lang.reflect.Array;
import java.util.*;
import java.lang.*;


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

        int N = sc.nextInt();
        List<Integer> a = new ArrayList<>();

        for (int i = 0; i < N; i++) {
            a.add(sc.nextInt());
        }

        Collections.sort(a);

        System.out.println(a.get(N - 1) - a.get(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