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");
	}
} import java.util.*; util.* java 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");
	}
} 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");
	} main {
		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");
	} 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 Integer[] A = new Integer[N]; A new Integer[N] N int all = 0; all 0 for (int i = 0; i < N; i++) {
			A[i] = sc.nextInt();
			all += A[i];
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			A[i] = sc.nextInt();
			all += A[i];
		} {
			A[i] = sc.nextInt();
			all += A[i];
		} A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc all += A[i] all A[i] A i sc.close() sc.close sc Arrays.sort(A, Collections.reverseOrder()) Arrays.sort Arrays A Collections.reverseOrder() Collections.reverseOrder Collections if (A[M - 1] < Math.ceil(all / (4.0 * M))) {
			System.out.println("No");
			return;
		} A[M - 1] < Math.ceil(all / (4.0 * M)) A[M - 1] A M - 1 M 1 Math.ceil(all / (4.0 * M)) Math.ceil Math all / (4.0 * M) all (4.0 * M) 4.0 M {
			System.out.println("No");
			return;
		} System.out.println("No") System.out.println System.out System System.out "No" return; System.out.println("Yes") System.out.println System.out System System.out "Yes" 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();

		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");
	}
} 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");
	}
} Main
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");
	}
}
