import java.util.Scanner;

class Main{

	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		String nums = sc.nextLine();
		String num[] = nums.split(" ");
		int N = Integer.parseInt(num[0]);
		int M = Integer.parseInt(num[1]);
		String inputs = sc.nextLine();
		String input[] = inputs.split(" ");

		int count = 0;
		int sum = 0;
		for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		}
		//System.out.println("sum = " + sum);

		//int popular = sum / (4 * M);
		double popular = (double)sum / (4 * M);
		//System.out.println("popular = " + popular);
		for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		}

		if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}

	}
}

class atcoder_20200404_2{
	public static void main(String args[]){
		new Main().main(args);
	}
} import java.util.Scanner; Scanner java.util class Main{

	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		String nums = sc.nextLine();
		String num[] = nums.split(" ");
		int N = Integer.parseInt(num[0]);
		int M = Integer.parseInt(num[1]);
		String inputs = sc.nextLine();
		String input[] = inputs.split(" ");

		int count = 0;
		int sum = 0;
		for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		}
		//System.out.println("sum = " + sum);

		//int popular = sum / (4 * M);
		double popular = (double)sum / (4 * M);
		//System.out.println("popular = " + popular);
		for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		}

		if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}

	}
} Main public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		String nums = sc.nextLine();
		String num[] = nums.split(" ");
		int N = Integer.parseInt(num[0]);
		int M = Integer.parseInt(num[1]);
		String inputs = sc.nextLine();
		String input[] = inputs.split(" ");

		int count = 0;
		int sum = 0;
		for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		}
		//System.out.println("sum = " + sum);

		//int popular = sum / (4 * M);
		double popular = (double)sum / (4 * M);
		//System.out.println("popular = " + popular);
		for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		}

		if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}

	} main {
		Scanner sc = new Scanner(System.in);
		String nums = sc.nextLine();
		String num[] = nums.split(" ");
		int N = Integer.parseInt(num[0]);
		int M = Integer.parseInt(num[1]);
		String inputs = sc.nextLine();
		String input[] = inputs.split(" ");

		int count = 0;
		int sum = 0;
		for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		}
		//System.out.println("sum = " + sum);

		//int popular = sum / (4 * M);
		double popular = (double)sum / (4 * M);
		//System.out.println("popular = " + popular);
		for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		}

		if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String nums = sc.nextLine(); nums sc.nextLine() sc.nextLine sc String num[] = nums.split(" "); num nums.split(" ") nums.split nums " " int N = Integer.parseInt(num[0]); N Integer.parseInt(num[0]) Integer.parseInt Integer num[0] num 0 int M = Integer.parseInt(num[1]); M Integer.parseInt(num[1]) Integer.parseInt Integer num[1] num 1 String inputs = sc.nextLine(); inputs sc.nextLine() sc.nextLine sc String input[] = inputs.split(" "); input inputs.split(" ") inputs.split inputs " " int count = 0; count 0 int sum = 0; sum 0 for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		} int i = 0; int i = 0; i 0 i < input.length i input.length input input.length i++ i++ i {
			sum += Integer.parseInt(input[i]);
		} {
			sum += Integer.parseInt(input[i]);
		} sum += Integer.parseInt(input[i]) sum Integer.parseInt(input[i]) Integer.parseInt Integer input[i] input i double popular = (double)sum / (4 * M); popular (double)sum / (4 * M) (double)sum (4 * M) 4 M for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		} int i = 0; int i = 0; i 0 i < input.length i input.length input input.length i++ i++ i {
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		} {
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		} if(Integer.parseInt(input[i]) >= popular){
				count++;
			} Integer.parseInt(input[i]) >= popular Integer.parseInt(input[i]) Integer.parseInt Integer input[i] input i popular {
				count++;
			} count++ count if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		} count >= M count 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 class atcoder_20200404_2{
	public static void main(String args[]){
		new Main().main(args);
	}
} atcoder_20200404_2 public static void main(String args[]){
		new Main().main(args);
	} main {
		new Main().main(args);
	} new Main().main(args) new Main().main new Main() args String args[] args
import java.util.Scanner;

class Main{

	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		String nums = sc.nextLine();
		String num[] = nums.split(" ");
		int N = Integer.parseInt(num[0]);
		int M = Integer.parseInt(num[1]);
		String inputs = sc.nextLine();
		String input[] = inputs.split(" ");

		int count = 0;
		int sum = 0;
		for(int i = 0;i < input.length;i++){
			sum += Integer.parseInt(input[i]);
		}
		//System.out.println("sum = " + sum);

		//int popular = sum / (4 * M);
		double popular = (double)sum / (4 * M);
		//System.out.println("popular = " + popular);
		for(int i = 0;i < input.length;i++){
			if(Integer.parseInt(input[i]) >= popular){
				count++;
			}
		}

		if(count >= M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}

	}
}

class atcoder_20200404_2{
	public static void main(String args[]){
		new Main().main(args);
	}
}
