Problem:
Score : 200 points

Problem Statement

Snuke has N sticks.
The length of the i-th stick is l_i.

Snuke is making a snake toy by joining K of the sticks together.

The length of the toy is represented by the sum of the individual sticks that compose it.
Find the maximum possible length of the toy.

Constraints

1 \leq K \leq N \leq 50

1 \leq l_i \leq 50

l_i is an integer.

Input

Input is given from Standard Input in the following format:

N K
l_1 l_2 l_3 ... l_{N}

Output

Print the answer.

Sample Input 1

5 3
1 2 3 4 5

Sample Output 1

12

You can make a toy of length 12 by joining the sticks of lengths 3, 4 and 5, which is the maximum possible length.

Sample Input 2

15 14
50 26 27 21 41 7 42 35 7 5 5 36 39 1 45

Sample Output 2

386

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

using System;

class Program
{
    static void Main(string[] args)
    {
        var nk = Console.ReadLine().Split(' ');
        var n = int.Parse(nk[0]);
        var k = int.Parse(nk[1]);
        var l = new int[n];

        var s = Console.ReadLine().Split(' ');
        for (int i = 0; i < n; i++)
        {
            l[i] = int.Parse(s[i]);
        }

        Array.Sort(l, (x, y) => y - x);

        var ans = 0;
        for (int i = 0; i < k; i++)
        {
            ans += l[i];
        }

        Console.WriteLine(ans);
    }
}