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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // 棒の本数
        int N = sc.nextInt();
        // 選ぶ本数
        int K = sc.nextInt();
        // 棒の長さを格納
        Integer[] card = new Integer[N];
        // 棒の長さを入力
        for (int i = 0; i < N; i++) {
            card[i] = sc.nextInt();
        }
        // 降順に並び替える
        Arrays.sort(card, Collections.reverseOrder());

        // 長さの合計値
        int totalLength = 0;
        for (int j = 0; j < K; j++) {
            totalLength = card[j] + totalLength;
        }

        System.out.println(totalLength);

    }
}