import java.util.*;

public class Main{
	public static void main(String args[]){
    	Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int k = sc.nextInt();
        
        List<Integer> p = new ArrayList<>();
      
      	for(int i = 0; i < n; i++){
        	p.add(sc.nextInt());
        }
      
      	Collections.sort(p);
      	Collections.reverse(p);
      
      	int result = 0;
      
      	for(int i=0; i < k; i++){
        	result += p.get(i);
        }
      
      	System.out.print(result);
    }
}