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 Scala (2.11.7) (judge verdict: Accepted)

import java.util.Scanner

/**
  * Created by goryudyuma on 2017/07/16.
  */


object Main {
  def main(args: Array[String]): Unit = {
    val sc = new Scanner(System.in)
    val N = sc.nextInt()
    val K = sc.nextInt()
    val arr: Array[Int] = new Array[Int](N)

    for (i <- 0 until N) {
      arr(i) = sc.nextInt()
    }
    val sortedArr = arr.sorted.reverse

    var ans = 0
    for (i <- 0 until K) {
      ans += sortedArr(i)
    }

    println(ans)
  }
}