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<stdio.h>
#include<string.h>
#include<stdlib.h>
int cmp(void const*a,void const*b)
{
    return *(int*)b-*(int*)a;
}
int main()
{
    int s[50],n,k,sum,i;
    while(scanf("%d%d",&n,&k)!=EOF)
    {
        sum=0;
        for(i=0;i<n;i++)
            scanf("%d",&s[i]);
        qsort(s,n,sizeof(s[0]),cmp);
        for(i=0;i<k;i++)
            sum+=s[i];
        printf("%d\n",sum);
    }
    return 0;
}