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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)


import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

class Main {

    public static void main(String[] args) throws IOException {
        Scanner Input = new Scanner(System.in);
        int N = Input.nextInt();
        int K = Input.nextInt();
        ArrayList<Integer> Li = new ArrayList();
        for (int I = 0; I < N; I++) {
            Li.add(Input.nextInt());
        }
        Collections.sort(Li);
        long Sum = 0;
        for (int I = Li.size()-1; I >= Li.size()-K; I--) {
        Sum+=Li.get(I);
        }
        System.out.println(Sum);
    }

}