import java.util.Arrays;
import java.util.Scanner;
import java.math.BigDecimal;
public class Main {
	public static void main(String[] args)throws Exception{
		Scanner stdIn=new Scanner(System.in);
		int N=stdIn.nextInt();
		int M=stdIn.nextInt();
		int A[]=new int[N];
		int sum=0;
		for(int i=0;i<N;i++){
			A[i]=stdIn.nextInt();
			sum+=A[i];
		}
		Arrays.sort(A);
		for(int i=0;i<M;i++){
			if(A[N-i-1]*4*M<sum){
				System.out.println("No");
				System.exit(0);
			}
		}
		System.out.println("Yes");
	}
}

/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