import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	}

} import java.util.ArrayList; ArrayList java.util import java.util.Comparator; Comparator java.util import java.util.List; List java.util 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();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int count = 0; count 0 List<Integer> list = new ArrayList<>(); list new ArrayList<>() for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		} {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		} int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc count += a count a list.add(a) list.add list a list.sort(Comparator.reverseOrder()) list.sort list Comparator.reverseOrder() Comparator.reverseOrder Comparator int c = list.get(m - 1); c list.get(m - 1) list.get list m - 1 m 1 int check = count / (4 * m); check count / (4 * m) count (4 * m) 4 m int check1 = count % (4 * m); check1 count % (4 * m) count (4 * m) 4 m if (check1 > 0) {
			check += 1;
		} check1 > 0 check1 0 {
			check += 1;
		} check += 1 check 1 if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		} c >= check c check {
			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" 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();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	}

} Main
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int count = 0;
		List<Integer> list = new ArrayList<>();

		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			count += a;
			list.add(a);
		}
		list.sort(Comparator.reverseOrder());
		int c = list.get(m - 1);

		int check = count / (4 * m);
		int check1 = count % (4 * m);
		if (check1 > 0) {
			check += 1;
		}

		if (c >= check) {
			System.out.println("Yes");

		} else {
			System.out.println("No");

		}

		sc.close();
	}

}