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 <stdlib.h>
#include <string.h>
#include <math.h>
#include <time.h>

#define _CRT_SECURE_NO_WARNINGS
#define TLong long long

// qsort(array, size, sizeof(int),comp);
int comp(const int *a,const int *b){
	return (*b - *a);
}

int main(int argc, char const *argv[]){
	int n,k,*l;
	int ans = 0;
	scanf("%d%d",&n,&k);
	l = (int *)malloc(sizeof(int) * n);
	for (int i = 0; i < n; ++i)	scanf(" %d",&l[i]);
	qsort(l,n,sizeof(int),comp);
	for (int i = 0; i < k; ++i)	ans += l[i];
	printf("%d\n",ans);	
}