

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];
		double sum = 0;
		int count = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

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

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

		/*if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		System.out.println(count >= M?"Yes":"No");



		sc.close();



	}

} 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];
		double sum = 0;
		int count = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

		/*if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		System.out.println(count >= M?"Yes":"No");



		sc.close();



	} main {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		double[] A = new double[N];
		double sum = 0;
		int count = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

		/*if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		System.out.println(count >= M?"Yes":"No");



		sc.close();



	} 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 double sum = 0; sum 0 int count = 0; count 0 for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			A[i] = sc.nextInt();
			sum += A[i];
		} {
			A[i] = sc.nextInt();
			sum += A[i];
		} A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum += A[i] sum A[i] A i for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		} {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		} if( 1/(4*M) <= A[i]/sum ) {
				count++;
			} 1/(4*M) <= A[i]/sum 1/(4*M) 1 (4*M) 4 M A[i]/sum A[i] A i sum {
				count++;
			} count++ count System.out.println(count >= M?"Yes":"No") System.out.println System.out System System.out count >= M?"Yes":"No" count >= M count M "Yes" "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();
		double M = sc.nextInt();
		double[] A = new double[N];
		double sum = 0;
		int count = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

		/*if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		System.out.println(count >= M?"Yes":"No");



		sc.close();



	}

} 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];
		double sum = 0;
		int count = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

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

		//System.out.println(1/(4*M) +","+ A[0]/sum);

		for(int i=0; i<N; i++) {
			if( 1/(4*M) <= A[i]/sum ) {
				count++;
			}
		}

		/*if(count >= M) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}*/
		System.out.println(count >= M?"Yes":"No");



		sc.close();



	}

}
