import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	}
} Main public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	} main {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	} Scanner kb = new Scanner(System.in); kb new Scanner(System.in) int n = kb.nextInt(); n kb.nextInt() kb.nextInt kb int m = kb.nextInt(); m kb.nextInt() kb.nextInt kb int p = m; p m int[] a = new int[n]; a new int[n] n int count = 0; count 0 for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		} {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		} int j = kb.nextInt(); j kb.nextInt() kb.nextInt kb count += j count j a[i] = j a[i] a i j for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		} int b a {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		} {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		} if (count / (4.0 * m) <= b) {
				p -= 1;
			} count / (4.0 * m) <= b count / (4.0 * m) count (4.0 * m) 4.0 m b {
				p -= 1;
			} p -= 1 p 1 if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} p <= 0 p 0 {
			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" kb.close() kb.close kb String[] args args public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	}
} public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner kb = new Scanner(System.in);
		int n = kb.nextInt();
		int m = kb.nextInt();
		int p = m;
		int[] a = new int[n];
		int count = 0;
		for (int i = 0; i < n; i++) {
			int j = kb.nextInt();
			count += j;
			a[i] = j;
		}
		for (int b : a) {
			if (count / (4.0 * m) <= b) {
				p -= 1;
			}
		}
		if (p <= 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		kb.close();
	}
}
