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