import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	}
} import java.util.Scanner; Scanner 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();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	} main {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int[] list = new int[n]; list new int[n] n double sum = 0; sum 0 int count = 0; count 0 for (int i = 0; i < n; i++) {
			list[i] = sc.nextInt();
			sum += list[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			list[i] = sc.nextInt();
			sum += list[i];
		} {
			list[i] = sc.nextInt();
			sum += list[i];
		} list[i] = sc.nextInt() list[i] list i sc.nextInt() sc.nextInt sc sum += list[i] sum list[i] list i for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		} {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		} if (list[i] >= sum / (4 * m)) {
				count++;
			} list[i] >= sum / (4 * m) list[i] list i sum / (4 * m) sum (4 * m) 4 m {
				count++;
			} count++ count if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} count >= m count m {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] list = new int[n];
		double sum = 0;
		int count = 0;

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

		for (int i = 0; i < n; i++) {
			if (list[i] >= sum / (4 * m)) {
				count++;
			}
		}

		if (count >= m) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.close();

	}
}