import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

	}
} Main public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

	} main {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

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

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

	}
} public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int N = input.nextInt();
		int M = input.nextInt();
		int[] a = new int[N];
		double sum =0;
		int p=0;
		
		for(int i=0;i<N;i++) {
			a[i]=input.nextInt();
			sum+=a[i];
		}
		for (int i = 0;i<N;i++ ) {
			if ((double)(sum/(4*M))<=a[i]) {
				p++;
			}
		}

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

	}
}
