#include <bits/stdc++.h> 
using namespace std;
#include <stdio.h>
#include <iomanip>
#include <iostream>
#include <string>
#include <algorithm>

int main(){
  int a, b;
  int count=0;
  cin >> a >> b;
  vector<int> vec(a);
  for(int i=0;i<a;i++){
    cin >> vec.at(i);
  }
  sort(vec.rbegin(),vec.rend());
  for(int i=0;i<b;i++){
    int c = count;
    count += vec.at(i);
   if(i>0&&c>count){
     count = c;
     break;
   }
  }
  cout << count;
    
}