import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

} Main public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	} main {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int N = scan.nextInt(); N scan.nextInt() scan.nextInt scan int M = scan.nextInt(); M scan.nextInt() scan.nextInt scan int[] A = new int[N]; A new int[N] N float votes = 0; votes 0 for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			A[i] = scan.nextInt();
			votes += A[i];
		} {
			A[i] = scan.nextInt();
			votes += A[i];
		} A[i] = scan.nextInt() A[i] A i scan.nextInt() scan.nextInt scan votes += A[i] votes A[i] A i Arrays.sort(A) Arrays.sort Arrays A int k = A[N-M]; k A[N-M] A N-M N M if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} k >= votes/(4*M) k votes/(4*M) votes (4*M) 4 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 scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

} public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int M = scan.nextInt();
		int[] A = new int[N];
		float votes = 0;
		for (int i = 0; i < N; i++) {
			A[i] = scan.nextInt();
			votes += A[i];
		}

		Arrays.sort(A);
		int k = A[N-M];

		if (k >= votes/(4*M)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

}