import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=M){
          System.out.println("Yes");
        }
      	else{
          System.out.println("No");
        }
		
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		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);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=M){
          System.out.println("Yes");
        }
      	else{
          System.out.println("No");
        }
		
	} main {
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=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 int A[] = new int[N]; A new int[N] N int sum=0; sum 0 int count=0; count 0 for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        } {
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        } A[i]=sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum=sum+A[i] sum sum+A[i] sum A[i] A i for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        } {
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        } if(A[i]>=(double)sum/4/M){
            	count=count+1;
            } A[i]>=(double)sum/4/M A[i] A i (double)sum/4/M (double)sum/4/M (double)sum 4 M {
            	count=count+1;
            } count=count+1 count count+1 count 1 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 public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=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);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=M){
          System.out.println("Yes");
        }
      	else{
          System.out.println("No");
        }
		
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		int N = sc.nextInt();
      	int M = sc.nextInt();
      	int A[] = new int[N];
      	int sum=0;
      	int count=0;
      
      	for(int i=0;i<N;i++){
        	A[i]=sc.nextInt();
        	sum=sum+A[i];
        }
      
      	for(int i=0;i<N;i++){
        	if(A[i]>=(double)sum/4/M){
            	count=count+1;
            }
        }
       	
		if(count>=M){
          System.out.println("Yes");
        }
      	else{
          System.out.println("No");
        }
		
	}
}