Problem:
Score : 200 points

Problem Statement

You are given an integer sequence A of length N.
Find the maximum absolute difference of two elements (with different indices) in A.

Constraints

2 \leq N \leq 100

1 \leq A_i \leq 10^9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
A_1 A_2 ... A_N

Output

Print the maximum absolute difference of two elements (with different indices) in A.

Sample Input 1

4
1 4 6 3

Sample Output 1

5

The maximum absolute difference of two elements is A_3-A_1=6-1=5.

Sample Input 2

2
1000000000 1

Sample Output 2

999999999

Sample Input 3

5
1 1 1 1 1

Sample Output 3

0

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

import java.util.Scanner;

public class Main {

	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();
		}

		int max = a[0];
		int min = a[0];

		for (int i = 0; i < a.length; i++) {
			int tmp = a[i];
			if(tmp > max) {
				max = tmp;
				continue;
			}
			if(tmp < min) {
				min = tmp;
				continue;
			}
		}
		System.out.println(max - min);
	}

}