/**

* Complete the Difference class by writing the following:

* A class constructor that takes an array of integers as a parameter and saves it to the elements instance variable.

* A computeDifference method that finds the maximum absolute difference between any 2 numbers

* in N and stores it in the maximumDifferece instance variable.

*/

class Difference {

private int[] elements;

public int maximumDifference;

public Difference(int[] arr){

this.elements = arr;

}

public void computeDifference(){

int min = this.elements[0], max = this.elements[0];

for(int i : this.elements){

if(i > max) max = i;

if(i < min) min = i;

}

this.maximumDifference = max - min;

}

}

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);

}

}