import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} 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();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc double M = sc.nextInt(); M sc.nextInt() sc.nextInt sc double a[] = new double[N]; a new double[N] N int vote = 0; vote 0 for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			a[i] = sc.nextInt();
			vote += a[i];
		} {
			a[i] = sc.nextInt();
			vote += a[i];
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc vote += a[i] vote a[i] a i int count = 0; count 0 for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		} {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		} if (a[i] >= (vote / (4 * M))) {
				count++;
			} a[i] >= (vote / (4 * M)) a[i] a i (vote / (4 * M)) vote (4 * M) 4 M {
				count++;
			} count++ count if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} M <= count M count {
			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" String[] args args public class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} public class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} Main
import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double a[] = new double[N];
		int vote = 0;
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
			vote += a[i];
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] >= (vote / (4 * M))) {
				count++;
			}
		}
		//System.out.println(vote);
		//System.out.println(vote / (4 * M));
		//System.out.println(count);
		if (M <= count) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

}
