import java.io.*; // for handling input/output
import java.util.*; // contains Collections framework

// don't change the name of this class
// you can add inner classes if needed
class Main {
  public static void main (String[] args) {
  
                    // Your code here
   Scanner sc = new Scanner(System.in);
   int n = sc.nextInt();
   int k = sc.nextInt();

   int[] prices = new int[n];
   for(int i = 0; i<n;i++){
     prices[i]= sc.nextInt();
   }
   Arrays.sort(prices);
   long sum = 0;
   for(int i = 2; i < k+2 ;i++){
       sum += prices[i];
     }
    System.out.println(sum);

	}
}