import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();

		Integer[] A = new Integer[N];
		int all = 0; // 総得票数
		for (int i = 0; i < N; i++) {
			A[i] = sc.nextInt();
			all += A[i];
		}
		sc.close();

		Arrays.sort(A, Collections.reverseOrder()); // 降順にソート

		// 選べなかったらNG
		if (A[M - 1] < Math.ceil(all / (4.0 * M))) {
			System.out.println("No");
			return;
		}
		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