import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	} main {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int Type = sc.nextInt(); Type sc.nextInt() sc.nextInt sc int Comd = sc.nextInt(); Comd sc.nextInt() sc.nextInt sc double sum = 0; sum 0 int cnt =0; cnt 0 double[] product = new double[Type]; product new double[Type] Type for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < Type i Type i++ i++ i {
			product[i] = sc.nextInt();
		} {
			product[i] = sc.nextInt();
		} product[i] = sc.nextInt() product[i] product i sc.nextInt() sc.nextInt sc for(int t = 0; t< Type ;t++) {
			sum += product[t];
		} int t = 0; int t = 0; t 0 t< Type t Type t++ t++ t {
			sum += product[t];
		} {
			sum += product[t];
		} sum += product[t] sum product[t] product t for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		} int num = 0; int num = 0; num 0 num < product.length num product.length product product.length num++ num++ num {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		} {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		} if(product[num] >= sum / (4*Comd)) {
				cnt++;
			} product[num] >= sum / (4*Comd) product[num] product num sum / (4*Comd) sum (4*Comd) 4 Comd {
				cnt++;
			} cnt++ cnt if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} cnt >= Comd cnt Comd {
			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) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int Type = sc.nextInt();
		int Comd = sc.nextInt();
		double sum = 0;
		int cnt =0;
		double[] product = new double[Type];
		for(int i = 0; i < Type; i++) {
			product[i] = sc.nextInt();
		}
		for(int t = 0; t< Type ;t++) {
			sum += product[t];
		}
		for(int num = 0; num < product.length;num++) {
			if(product[num] >= sum / (4*Comd)) {
				cnt++;
			}
		}
		if(cnt >= Comd) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}
}
