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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
#include <vector>		
#include <algorithm> // sort
#include <functional> //降順ソート


using namespace std;

int main() {
	int N, K;

	cin >> N >> K;

	std::vector<int> l;

	int inp=0;
	for (int i = 0 ; i < N ; i++) {
		cin >> inp;
		// 配列に要素を追加
		l.push_back(inp);
	}
	// 配列のソート
	std::sort(l.begin(), l.end(), std::greater<int>());

	int maxval = 0;
	for (int j = 0; j < K; j++) {
		maxval += l[j];
	}
	cout << maxval << endl;
}