import java.util.Scanner;

public class Main {

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

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

public class Main {

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