import java.util.*;

public class Main 
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		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 scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		if(count >= m)
		{
			System.out.println("Yes");	
		}
		else
		{
			System.out.println("No");
		}
			
	}
} Main public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		if(count >= m)
		{
			System.out.println("Yes");	
		}
		else
		{
			System.out.println("No");
		}
			
	} main {
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		if(count >= m)
		{
			System.out.println("Yes");	
		}
		else
		{
			System.out.println("No");
		}
			
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int a = 0; a 0 ArrayList<Integer> alist = new ArrayList<Integer>(); alist new ArrayList<Integer>() for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		} {
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		} int x = scan.nextInt(); x scan.nextInt() scan.nextInt scan alist.add(x) alist.add alist x a += x a x scan.close() scan.close scan int v = (a + 4*m-1) / (4 * m); v (a + 4*m-1) / (4 * m) (a + 4*m-1) a + 4*m a 4*m 4 m 1 (4 * m) 4 m int count = 0; count 0 for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		} int i alist {
			if(i >= v)
			{
				count++;
			}
		} {
			if(i >= v)
			{
				count++;
			}
		} if(i >= v)
			{
				count++;
			} i >= v i v {
				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 public class Main 
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		if(count >= m)
		{
			System.out.println("Yes");	
		}
		else
		{
			System.out.println("No");
		}
			
	}
} public class Main 
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		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 scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int m = scan.nextInt();
		
		int a = 0;
		
		ArrayList<Integer> alist = new ArrayList<Integer>();
		
		for(int i = 0; i < n; i++)
		{
			int x = scan.nextInt();
			alist.add(x);
			a += x;
		}
		scan.close();
		
		int v = (a + 4*m-1) / (4 * m);
		
		int count = 0;
		
		for(int i : alist)
		{
			if(i >= v)
			{
				count++;
			}
		}	
				
		if(count >= m)
		{
			System.out.println("Yes");	
		}
		else
		{
			System.out.println("No");
		}
			
	}
}
