Problem:
Score : 200 points

Problem Statement

It is only six months until Christmas, and AtCoDeer the reindeer is now planning his travel to deliver gifts.

There are N houses along TopCoDeer street. The i-th house is located at coordinate a_i. He has decided to deliver gifts to all these houses.

Find the minimum distance to be traveled when AtCoDeer can start and end his travel at any positions.

Constraints

1 ≤ N ≤ 100

0 ≤ a_i ≤ 1000

a_i is an integer.

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 ... a_N

Output

Print the minimum distance to be traveled.

Sample Input 1

4
2 3 7 9

Sample Output 1

7

The travel distance of 7 can be achieved by starting at coordinate 9 and traveling straight to coordinate 2.

It is not possible to do with a travel distance of less than 7, and thus 7 is the minimum distance to be traveled.

Sample Input 2

8
3 1 4 1 5 9 2 6

Sample Output 2

8

There may be more than one house at a position.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

public class Main {
		public static void main(String[] args) {
		
	   Scanner sc = new Scanner(System.in);
	   
	   int N = sc.nextInt();
	     Integer a[] = new Integer[N];
			for (int i=0; i<N; i++) {
				a[i] = sc.nextInt();
			}
	Arrays.sort(a, Collections.reverseOrder());
	       int ans = 0;
	   
	   for(int i=0; i<N-1; i++ ) {
		   ans += a[i] - a[i+1];
	   }
	   System.out.println(ans);
		}
}