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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;



namespace Test
{
    class MainClass
    {
        static void Main(string[] args) {
            int n = int.Parse(Console.ReadLine());
            var s = Console.ReadLine().Split(' ');
            var a = new int[100];
            int maxval = -1;
            int minval = 1000000001;
            for (int i = 0; i < n; i++) {
                a[i] = int.Parse(s[i]);
                maxval = Math.Max(maxval, a[i]);
                minval = Math.Min(minval, a[i]);
            }
            Console.WriteLine(maxval - minval);
        }
    }
}