/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* java public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	}
} Main public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	} main {
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int n=sc.nextInt() n sc.nextInt() sc.nextInt sc m=sc.nextInt(); m sc.nextInt() sc.nextInt sc int[] a= new int[n]; a new int[n] n for(int i=0;i<n;i++)a[i]=sc.nextInt(); int i=0; int i=0; i 0 i<n i n i++ i++ i a[i]=sc.nextInt(); a[i]=sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int sum=0; sum 0 for(int ele:a)sum+=ele; int ele a sum+=ele; sum+=ele sum ele double min = ((double)sum)/(4*m); min ((double)sum)/(4*m) ((double)sum) (4*m) 4 m int sat = 0; sat 0 for(double ele:a)if(ele>=min)sat++; double ele a if(ele>=min)sat++; if(ele>=min)sat++; ele>=min ele min sat++ sat String ans = ((sat>=m)?"Yes":"No"); ans ((sat>=m)?"Yes":"No") (sat>=m) sat m "Yes" "No" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	}
} public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	}
} Main
/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),m=sc.nextInt();
		int[] a= new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int sum=0;
		for(int ele:a)sum+=ele;
		double min = ((double)sum)/(4*m);
		int sat = 0;
		for(double ele:a)if(ele>=min)sat++;
		String ans = ((sat>=m)?"Yes":"No");
		System.out.println(ans);
	}
}