import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt(), m = sc.nextInt(), vn = 0, cnt = 0, p[] = new int[n];

		for(int i = 0; i < n; i++) {
			p[i] = sc.nextInt();
			vn += p[i];
		}

		double b = vn / 4.0 / m;

		for(int i = 0; i < n; i++) {
			if(b <= p[i]) cnt++;
		}

		System.out.println(m <= cnt ? "Yes" : "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