import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

} import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections java.util import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

} Main public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	} main {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	} int N; N int M; M int temp; temp int sum = 0; sum 0 int P; P ArrayList<Integer> A = new ArrayList<Integer>(); A new ArrayList<Integer>() Scanner sc = new Scanner(System.in); sc new Scanner(System.in) N = sc.nextInt() N sc.nextInt() sc.nextInt sc M = sc.nextInt() M sc.nextInt() sc.nextInt sc int i; i for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		} i = 0; i = 0 i 0 i < N i N i++ i++ i {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		} {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		} temp = sc.nextInt() temp sc.nextInt() sc.nextInt sc A.add(temp) A.add A temp sum += temp sum temp Collections.sort(A, Collections.reverseOrder()) Collections.sort Collections A Collections.reverseOrder() Collections.reverseOrder Collections P = A.get(M - 1) P A.get(M - 1) A.get A M - 1 M 1 if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		} (double) sum / 4 / M > P (double) sum / 4 / M (double) sum / 4 / M (double) sum 4 M P {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

} Main
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int N;
		int M;
		int temp;
		int sum = 0;
		int P;
		ArrayList<Integer> A = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		M = sc.nextInt();
		int i;
		for (i = 0; i < N; i++) {
			temp = sc.nextInt();
			A.add(temp);
			sum += temp;
		}
		Collections.sort(A, Collections.reverseOrder());
		P = A.get(M - 1);
		if ((double) sum / 4 / M > P) {
			System.out.println("No");
		} else {
			System.out.println("Yes");
		}
		sc.close();
	}

}