import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws FileNotFoundException {

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}
} import java.io.FileNotFoundException; FileNotFoundException java.io import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) throws FileNotFoundException {

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

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

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	} main {

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	} 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 int sum = 0; sum 0 for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			A[i] = sc.nextInt();
			sum += A[i];
		} {
			A[i] = sc.nextInt();
			sum += A[i];
		} A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum += A[i] sum A[i] A i sc.close() sc.close sc int anscnt = 0; anscnt 0 for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		} {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		} double p = A[i]; p A[i] A i double q = (double)sum/(double)(4*M); q (double)sum/(double)(4*M) (double)sum (double)(4*M) 4 M if(p>=q) {
				anscnt++;
			} p>=q p q {
				anscnt++;
			} anscnt++ anscnt if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} anscnt>=M anscnt 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) throws FileNotFoundException {

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

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

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}
} Main
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws FileNotFoundException {

		//    	File file = new File("src/in.txt");
		//    	Scanner sc = new Scanner(file);

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int M = sc.nextInt();
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int anscnt = 0;
		for(int i=0;i<N;i++) {
			double p = A[i];
			double q = (double)sum/(double)(4*M);
			if(p>=q) {
				anscnt++;
			}
		}
		if(anscnt>=M) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}
}