#include <algorithm>
#include <iostream>
#include <algorithm>

using namespace std;
int main() {
    int n, k;
    cin >> n >> k;
    int arr[n];
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    sort(arr, arr + n);
    reverse(arr, arr+n);
    long long sum = 0;
    for (int i = 0; i < k; i++) {
       sum+= arr[i];
    }
    cout << sum << endl;


    return 0;
}