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: Wrong Answer)

import java.util.Scanner;

public class Main {

	static Scanner scan = new Scanner(System.in);

	public static void main(String[] args) {
		int n = scan.nextInt();

		int first = scan.nextInt();
		int max = first;
		int min = first;
		for(int i = 1; i < n; i++) {
			int a = scan.nextInt();
			if(max < i) {
				max = a;
			}else if(min > i) {
				min = a;
			}
		}

		System.out.println(max - min);
    }
}