import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(input.readLine());
        StringTokenizer tokn = new StringTokenizer(input.readLine());

        int min = Integer.MAX_VALUE;
        int max = -1;

        for (int i = 0; i < n; i++) {
            int value = Integer.parseInt(tokn.nextToken());
            if (value < min) {
                min = value;
            }
            if (value > max) {
                max = value;
            }
        }
        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