import java.util.*;
import java.util.Arrays;
import java.util.Collections;

public class Main{
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int m = scan.nextInt();
		int list[]  = new int[n];
		double sum = 0;
		boolean flag = true;

		for(int i=0; i < n; i++){
			list[i] = scan.nextInt();
			sum += list[i];
		}
		double line = sum / (4 * m);
		int con = 0;
		for(int i=0; i < n; i++){
			if (line <= list[i]) con++;
		}
		if(con < m)flag=false;
		if(flag){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz