Day14_Scope

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;


class Difference {
  	private int[] elements;
  	public int maximumDifference;

	
    Difference(int[] a)
    {
       elements=a;
        
    }

    void computeDifference()
    {   int n=elements.length;
        Arrays.sort(elements);
        maximumDifference=Math.abs(elements[0]-elements[n-1]);
    }
} // End of Difference class

public class Solution {

    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();
        }
        sc.close();

        Difference difference = new Difference(a);

        difference.computeDifference();

        System.out.print(difference.maximumDifference);
    }
}