Problem:
Score : 200 points

Problem Statement

We have held a popularity poll for N items on sale. Item i received A_i votes.

From these N items, we will select M as popular items. However, we cannot select an item with less than \dfrac{1}{4M} of the total number of votes.

If M popular items can be selected, print Yes; otherwise, print No.

Constraints

1 \leq M \leq N \leq 100

1 \leq A_i \leq 1000

A_i are distinct.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N M
A_1 ... A_N

Output

If M popular items can be selected, print Yes; otherwise, print No.

Sample Input 1

4 1
5 4 2 1

Sample Output 1

Yes

There were 12 votes in total. The most popular item received 5 votes, and we can select it.

Sample Input 2

3 2
380 19 1

Sample Output 2

No

There were 400 votes in total. The second and third most popular items received less than \dfrac{1}{4\times 2} of the total number of votes, so we cannot select them. Thus, we cannot select two popular items.

Sample Input 3

12 3
4 56 78 901 2 345 67 890 123 45 6 789

Sample Output 3

Yes

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;
public class Main
{
	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	
     	String[] sep = sc.nextLine().split(" ");
      	int n = Integer.parseInt(sep[0]);
      	int m = Integer.parseInt(sep[1]);
      	int[] bigger = new int[n];
      	String[] sepa = sc.nextLine().split(" ");
      	int sumVote = 0;
      	for(int i = 0; i < n; i++)
        {
         	bigger[i] =  Integer.parseInt(sepa[i]);
          	sumVote += bigger[i];
        }
      	int judge = 0;
      	for(int i = 0; i < n; i++)
        {
          	int amari = sumVote % (4 * m);
            if(bigger[i] > sumVote / (4 * m))
            {
                  judge++;
            }else if(bigger[i] == sumVote / (4 * m) && sumVote % (4 * m) == 0){
             	 judge++;
            }
        }
      
      if(judge >= m)
      {
        	System.out.print("Yes");
      }else{
        	System.out.print("No");
      }
    }
}