#include <bits/stdc++.h>
using namespace std;

int main() {
	int N, K;
	cin >> N >> K;

	vector<int> v(N);
	for (int i = 0; i < N; i++) {
		cin >> v.at(i);
	}

	sort(v.begin(), v.end());
	reverse(v.begin(), v.end());
	int s = 0;
	for (int i = 0; i < K; i++) {
		int n = s;
		s += v.at(i);
		if ((i > 0) && (s <= n)) {
			s = n;
			break;
		}
	}

	cout << s << endl;
}