import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	int N = sc.nextInt();
	int min = Integer.MAX_VALUE;
	int max = 0;
	int val = 0;
	for(int i=0;i<N;i++){
	    val = sc.nextInt();
	    if(val > max) max = val;
	    if(val < min) min = val;
	}
	System.out.print(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