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.*;

public class Main {

	static void log(int i) {
		System.out.println(i);
	}
	static void log(String s) {
		System.out.println(s);
	}
	
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int m = sc.nextInt();
		int ary[] = new int[n];
		long total=0;
		
		for (int i=0; i<n; i++) {
			ary[i] = sc.nextInt();
			total+=ary[i];
		}
		
		int aryPick[] = new int[m];
				
		// loop for input data
		int ctr=0;
		for (int j =0; j<n && ctr < m ; j++) {
			if ( (4 * m * ary[j]) >= total) {
				aryPick[ctr]=ary[j];
				ctr++;
			}
		}
		
		sc.close();
		log( (ctr<m) ? "No" : "Yes");
	}
}