include <iostream>

include <algorithm>

include <vector>

using namespace std;

int maxSum(int n, int k, vector<int> cards) {
sort(cards.begin(), cards.end());
int sum = 0;
for (int i = 0; i < k - 1; i++) {
sum += cards[i];
}
return sum + cards[n - 1];
}

int main() {
int n, k;
cin >> n >> k;
vector<int> cards(n);
for (int i = 0; i < k; i++) {
cin >> cards[i];
}
cout << maxSum(n, k, cards) << endl;
return 0;
}