import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	}

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

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	} main {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	} 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[] a = new int[n]; a new int[n] n double total = 0; total 0 int count = 0; count 0 for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			a[i] = sc.nextInt();
			total += a[i];
		} {
			a[i] = sc.nextInt();
			total += a[i];
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc total += a[i] total a[i] a i for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		} {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		} if (total / 4 / m <= a[i]) {
				count++;
			} total / 4 / m <= a[i] total / 4 / m total / 4 / m total 4 m a[i] a i {
				count++;
			} count++ count if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes"); count < m count 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) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
      
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] a = new int[n];
		double total = 0;
		int count = 0;

		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			total += a[i];
		}
		for (int i = 0; i < n; i++) {
			if (total / 4 / m <= a[i]) {
				count++;
			}
		}
		if (count < m)
			System.out.println("No");
		else
			System.out.println("Yes");
	}

}