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.Scanner;

/**
 * Created by nakatsukatakahiro on 2017/06/10.
 */
class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        int N = Integer.parseInt(scanner.next());

        int max = Integer.MIN_VALUE;
        int min = Integer.MAX_VALUE;

        for (int i = 0; i < N; i++) {
            int tmp = Integer.parseInt(scanner.next());
            if (tmp > max) {
                max = tmp;
            }
            if (tmp < min) {
                min = tmp;
            }
        }
        System.out.println(max - min);
    }
}