import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
		
	}
} import java.util.ArrayList; ArrayList java.util import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
		
	}
} Main public static void main(String[] args) {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
		
	} main {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=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 ArrayList<Integer> list=new ArrayList<>(); list new ArrayList<>() for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			int c=sc.nextInt();
			list.add(c);
		} {
			int c=sc.nextInt();
			list.add(c);
		} int c=sc.nextInt(); c sc.nextInt() sc.nextInt sc list.add(c) list.add list c int c=0 c 0 total=0; total 0 for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
	
			total=total+list.get(i);
		} {
	
			total=total+list.get(i);
		} total=total+list.get(i) total total+list.get(i) total list.get(i) list.get list i double limit=(double)1/(4*m)*(double)total; limit (double)1/(4*m)*(double)total (double)1/(4*m) (double)1 (4*m) 4 m (double)total for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		} {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		} if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			} list.get(i)>=limit list.get(i) list.get list i limit {
				
		//	System.out.println(limit);
				c++;
				
			} c++ c if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		} c>=m c 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) {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			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 n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
		
	}
} Main
import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc= new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		
		ArrayList<Integer> list=new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			int c=sc.nextInt();
			list.add(c);
		}
		int c=0,total=0;
		for(int i=0;i<n;i++) {
	
			total=total+list.get(i);
		}

		
		double limit=(double)1/(4*m)*(double)total;
		for(int i=0;i<n;i++) {
			if(list.get(i)>=limit) {
				
		//	System.out.println(limit);
				c++;
				
			}
			
		}
		if(c>=m) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
		
	}
}
