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: Wrong Answer)

using System;

class Program{
    static void Main(){
        int N = int.Parse(Console.ReadLine());
        int L, kL;
        string[] str = Console.ReadLine().Split(' ');
        
        L = 0;
        kL = 0;
        for(int i = 0; i < N-1; i++){
            L = System.Math.Abs( int.Parse(str[i]) - int.Parse(str[i+1]) );
            if(L > kL){
                kL = L;
            }
        }
        Console.WriteLine("{0}", kL);
    }
}