Problem:
Score : 200 points

Problem Statement

Snuke has N sticks.
The length of the i-th stick is l_i.

Snuke is making a snake toy by joining K of the sticks together.

The length of the toy is represented by the sum of the individual sticks that compose it.
Find the maximum possible length of the toy.

Constraints

1 \leq K \leq N \leq 50

1 \leq l_i \leq 50

l_i is an integer.

Input

Input is given from Standard Input in the following format:

N K
l_1 l_2 l_3 ... l_{N}

Output

Print the answer.

Sample Input 1

5 3
1 2 3 4 5

Sample Output 1

12

You can make a toy of length 12 by joining the sticks of lengths 3, 4 and 5, which is the maximum possible length.

Sample Input 2

15 14
50 26 27 21 41 7 42 35 7 5 5 36 39 1 45

Sample Output 2

386

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define vi vector<int>
#define pb push_back
#define P pair<int,int>
#define PP pair<P,int>
#define fi first
#define se second
#define INF (1<<30)
#define MOD 1000000007
#define all(a) (a).begin(),(a).end()


signed main(){
    int n,k;
    cin>>n>>k;
    vi vec;
    for(int i=0;i<n;i++){
        int t;
        cin>>t;
        vec.pb(t);
    }
    sort(all(vec),greater<int>());
    int ans=0;
    for(int i=0;i<k;i++){
        ans+=vec[i];
    }
    cout<<ans<<endl;
    return 0;
}