import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;
public class Main {
	 public static void main(String args[]){
	Scanner scanner = new Scanner(System.in);

	int n=scanner.nextInt();
	int i=scanner.nextInt();
	Integer[] m=new Integer[n];
	int t=0;


	for(int j=0;j<n;j++) {
		int a=scanner.nextInt();
		m[j]=a;
	}

	for(int j=0;j<n;j++) {
		t=t+m[j];
	}

	Arrays.sort(m,Collections.reverseOrder());
	
	int g=4*i;
	if(m[i-1]*g<t) {
	System.out.println("No");
	}
	else {
		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