import java.util.*;
import java.lang.*;
import java.io.*;

class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* java class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	} 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[] arr=new int[n]; arr new int[n] n int sum=0; sum 0 for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        } {
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        } arr[i]=sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc sum+=arr[i] sum arr[i] arr i float check=(float)sum/(4*m); check (float)sum/(4*m) (float)sum (4*m) 4 m int count=0; count 0 for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        	if(arr[i]>=check)
        		count++;	
        } {
        	if(arr[i]>=check)
        		count++;	
        } if(arr[i]>=check)
        		count++; arr[i]>=check arr[i] arr i check 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" sc.close() sc.close sc String[] args args
import java.util.*;
import java.lang.*;
import java.io.*;

class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
        int m=sc.nextInt();
        int[] arr=new int[n];
        
        int sum=0;
        for(int i=0; i<n; i++){
        	arr[i]=sc.nextInt();
        	sum+=arr[i];
        }
        // System.out.println(sum);
        float check=(float)sum/(4*m);

        int count=0;
        for(int i=0; i<n; i++){
        	if(arr[i]>=check)
        		count++;	
        }
        // System.out.println(check);
        // System.out.println(count);
        if(count>=m)
        	System.out.println("Yes");
        else
        	System.out.println("No");

		sc.close();
	}
}