import java.util.*;
public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			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