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 System.Text;
using System.Threading.Tasks;

namespace ConsoleApp36 {
    class Program {
        static void Main(string[] args) {
            var X = Console.ReadLine().Split(' ').Select(t => int.Parse(t)).ToArray();
            int N = X[0];
            int K = X[1];

            int[] l = Console.ReadLine().Split(' ').Select(t => int.Parse(t)).ToArray();
            //lをソートする
            Array.Sort(l);
            Array.Reverse(l);

            int ans = 0;

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

            Console.WriteLine(ans);
        }
    }
}