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;
using System.Collections.Generic;
using System.Linq;
using static System.Math;

class Program{
  public static void Main(){

    var input = Console.ReadLine().Split();
    int n = int.Parse(input[0]);
    int k = int.Parse(input[1]);
    var input2 = Console.ReadLine().Split();
    var l = new int[n];
    for(int i=0;i<n;i++){
      l[i] = int.Parse(input2[i]);
    }
    Array.Sort(l);
    int ans = 0;
    for(int i=n-1; i>=n-k; i--){
      ans += l[i];
    }
    Console.WriteLine(ans);
  }
}