import java.util.*;
public class Main {
    public static void main(String [] args) {
        Scanner sc = new Scanner(System.in);
        int min=999999999,max=0;
        int N = sc.nextInt();
        for(int i=0;i<N;i++){
            int num = sc.nextInt();
            if(max<num) max = num;
            if(min>num) min = num;
        }
        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