import java.util.*;

public class Main{

	public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
		int a[]=new int[n];
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
		}
		int max=0;
		int min=1000000000;
		for(int i=0;i<n;i++){
			max=Math.max(max,a[i]);
		}
		for(int i=0;i<n;i++){
			min=Math.min(min,a[i]);
		}
		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