import java.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner stdIn=new Scanner(System.in);
        
        int N=stdIn.nextInt();
        int M=stdIn.nextInt();
        int count=0;
        int sum=0;
        
        int []a=new int[N];
        for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        }
        double Sum=sum/4.0/M;
        for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        }
        if(count>=M){
            System.out.println("Yes");
            
        }
        else{
            System.out.println("No");
            
        }
        
    }

} import java.util.Scanner; Scanner java.util class Main {

    public static void main(String[] args) {
        Scanner stdIn=new Scanner(System.in);
        
        int N=stdIn.nextInt();
        int M=stdIn.nextInt();
        int count=0;
        int sum=0;
        
        int []a=new int[N];
        for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        }
        double Sum=sum/4.0/M;
        for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        }
        if(count>=M){
            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 count=0;
        int sum=0;
        
        int []a=new int[N];
        for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        }
        double Sum=sum/4.0/M;
        for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        }
        if(count>=M){
            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 count=0;
        int sum=0;
        
        int []a=new int[N];
        for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        }
        double Sum=sum/4.0/M;
        for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        }
        if(count>=M){
            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 count=0; count 0 int sum=0; sum 0 int []a=new int[N]; a new int[N] N for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            a[i]=stdIn.nextInt();
            sum+=a[i];
        } {
            a[i]=stdIn.nextInt();
            sum+=a[i];
        } a[i]=stdIn.nextInt() a[i] a i stdIn.nextInt() stdIn.nextInt stdIn sum+=a[i] sum a[i] a i double Sum=sum/4.0/M; Sum sum/4.0/M sum/4.0/M sum 4.0 M for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        } int i=0; int i=0; i 0 i<a.length i a.length a a.length i++ i++ i {
            if(a[i]>=Sum){
                count++;
            }
        } {
            if(a[i]>=Sum){
                count++;
            }
        } if(a[i]>=Sum){
                count++;
            } a[i]>=Sum a[i] a i Sum {
                count++;
            } 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("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
import java.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner stdIn=new Scanner(System.in);
        
        int N=stdIn.nextInt();
        int M=stdIn.nextInt();
        int count=0;
        int sum=0;
        
        int []a=new int[N];
        for(int i=0; i<N; i++){
            a[i]=stdIn.nextInt();
            sum+=a[i];
        }
        double Sum=sum/4.0/M;
        for(int i=0; i<a.length; i++){
            if(a[i]>=Sum){
                count++;
            }
        }
        if(count>=M){
            System.out.println("Yes");
            
        }
        else{
            System.out.println("No");
            
        }
        
    }

}