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 JavaScript (node.js v5.12) (judge verdict: Accepted)

'use strict'

const main = input => {
	const args = input.trim().split('\n')
	const n = parseInt(args[0], 10)
	const a = args[1].split(' ').map(Number)
	let min = 1000000001
	let max = 0

	for (let i = 0; i < n; i++) {
		min = Math.min(min, a[i])
		max = Math.max(max, a[i])
	}

	console.log(max - min)
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'))