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++ (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
int main()
{
	long long n,i,j,k,t,s,a[51];
	cin>>n>>k;
	for(i=1;i<=n;i++) cin>>a[i];
	for(i=1;i<n;i++)
	 for(j=i+1;j<=n;j++)
	  if(a[i]<a[j])
	   {
	   	 t=a[i];
	   	 a[i]=a[j];
	   	 a[j]=t;
	   }
	for(i=1;i<=k;i++) s+=a[i];
	cout<<s<<endl;
	return 0;
}