import java.util.*;
import java.lang.*;
import java.io.*;

class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	}
}
/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