import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			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 stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	} main {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	} Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int N = stdIn.nextInt(); N stdIn.nextInt() stdIn.nextInt stdIn int M = stdIn.nextInt(); M stdIn.nextInt() stdIn.nextInt stdIn int[] As = new int[N]; As new int[N] N double totalVotes = 0; totalVotes 0 for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		} int i = 0; int i = 0; i 0 i < N i N i ++ i ++ i {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		} {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		} As[i] = stdIn.nextInt() As[i] As i stdIn.nextInt() stdIn.nextInt stdIn totalVotes += As[i] totalVotes As[i] As i int buyNum = 0; buyNum 0 for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		} int i = 0; int i = 0; i 0 i < As.length i As.length As As.length i ++ i ++ i {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		} {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		} if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			} totalVotes / (4 * M) <= As[i] totalVotes / (4 * M) totalVotes (4 * M) 4 M As[i] As i {
				buyNum ++;
			} buyNum ++ buyNum if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} M <= buyNum M buyNum {
			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 stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int M = stdIn.nextInt();
		int[] As = new int[N];
		double totalVotes = 0;
		for(int i = 0; i < N; i ++) {
			As[i] = stdIn.nextInt();
			totalVotes += As[i];
		}
		
		int buyNum = 0;
		
		for(int i = 0; i < As.length; i ++) {
			if(totalVotes / (4 * M) <= As[i]) {
				buyNum ++;
			}
		}
		
		if(M <= buyNum) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
}