//package ABC;
import 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();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	}
	
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	}
	
} Main public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	} main {
		Scanner sc=new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	} 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 int all=0; all 0 int[] a =new int[n]; a new int[n] n for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			a[i]=sc.nextInt();
			all=all+a[i];
		} {
			a[i]=sc.nextInt();
			all=all+a[i];
		} a[i]=sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc all=all+a[i] all all+a[i] all a[i] a i double min=1.0 * all/(m*4); min 1.0 * all/(m*4) 1.0 * all 1.0 all (m*4) m 4 int check=0; check 0 for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			if(a[i]>=min){
				check++;
				
			}
		} {
			if(a[i]>=min){
				check++;
				
			}
		} if(a[i]>=min){
				check++;
				
			} a[i]>=min a[i] a i min {
				check++;
				
			} check++ check if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		} check<m check m {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" 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();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	}
	
} public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		int n=sc.nextInt();
		int m=sc.nextInt();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	}
	
} Main
//package ABC;
import 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();
		
		int all=0;
		int[] a =new int[n];
		
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
			all=all+a[i];
		}
		//System.out.println(all);
		
		double min=1.0 * all/(m*4);
		//System.out.println(min);
		
		int check=0;
		for(int i=0;i<n;i++){
			if(a[i]>=min){
				check++;
				
			}
		}
		//System.out.println(check);
		if(check<m){
			System.out.println("No");
		}else{
			System.out.println("Yes");
		}

		
	}
	
}
