import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	}
} Main public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	} main {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) final int N = in.nextInt(); N in.nextInt() in.nextInt in final int M = in.nextInt(); M in.nextInt() in.nextInt in int[] votes = new int[N]; votes new int[N] N int total = 0; total 0 for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			votes[i] = in.nextInt();
			total += votes[i];
		} {
			votes[i] = in.nextInt();
			total += votes[i];
		} votes[i] = in.nextInt() votes[i] votes i in.nextInt() in.nextInt in total += votes[i] total votes[i] votes i Arrays.sort(votes) Arrays.sort Arrays votes if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes"); votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)) votes[(N - 1) - (M - 1)] votes (N - 1) - (M - 1) (N - 1) N 1 (M - 1) M 1 (double) total * ((double) 1 / ((double) 4 * M)) (double) total ((double) 1 / ((double) 4 * M)) (double) 1 ((double) 4 * M) (double) 4 M System.out.println("No") System.out.println System.out System System.out "No" 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 in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	}
} public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		final int N = in.nextInt();
		final int M = in.nextInt();
		int[] votes = new int[N];
		int total = 0;
		for(int i = 0; i < N; i++) {
			votes[i] = in.nextInt();
			total += votes[i];
		}
		Arrays.sort(votes);
		if(votes[(N - 1) - (M - 1)] < (double) total * ((double) 1 / ((double) 4 * M)))
			System.out.println("No");
		else System.out.println("Yes");
	}
}