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)

const Main = (input) => {
  const ar = input[1].split(' ');
  var mx = 1;
  var mn = Math.pow(10, 9);
  for (var v of ar) {
    mx = parseInt(v) > mx ? parseInt(v) : mx;
    mn = parseInt(v) < mn ? parseInt(v) : mn;
  }
  console.log(mx - mn);
}

// 標準入力を受け取るおまじない
Main(require('fs').readFileSync('/dev/stdin', 'utf8').split('\n'));