import java.util.Scanner;

public class Main
{
    public static void main(String [] args)
    {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    }
}

//4 1 
//5 4 2 1 
//total vote count = 12 , min popular item = 12/8 = 3/2 = 1. import java.util.Scanner; Scanner java.util public class Main
{
    public static void main(String [] args)
    {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    }
} Main public static void main(String [] args)
    {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    } main {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    } Scanner key = new Scanner(System.in); key new Scanner(System.in) int n = key.nextInt(); n key.nextInt() key.nextInt key int m = key.nextInt(); m key.nextInt() key.nextInt key int arr[] = new int[n]; arr new int[n] n int sum =0; sum 0 for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        } {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        } arr[i] = key.nextInt() arr[i] arr i key.nextInt() key.nextInt key sum = sum + arr[i] sum sum + arr[i] sum arr[i] arr i double mar = (sum/(m*4.0)); mar (sum/(m*4.0)) sum (m*4.0) m 4.0 int count = 0; count 0 for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
            if(arr[i] >= mar)
            {
                count ++;
            }
        } {
            if(arr[i] >= mar)
            {
                count ++;
            }
        } if(arr[i] >= mar)
            {
                count ++;
            } arr[i] >= mar arr[i] arr i mar {
                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 key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    }
} public class Main
{
    public static void main(String [] args)
    {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;

public class Main
{
    public static void main(String [] args)
    {
        Scanner key = new Scanner(System.in);
        int n = key.nextInt();
        int m = key.nextInt();
        int arr[] = new int[n];
        int sum =0;
        for(int i = 0; i<n;i++)
        {
            arr[i] = key.nextInt();
            sum = sum + arr[i];
        }
        double mar = (sum/(m*4.0));
        int count = 0;
        for(int i = 0; i<n; i++)
        {
            if(arr[i] >= mar)
            {
                count ++;
            }
        }
        if(count >= m)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
    }
}

//4 1 
//5 4 2 1 
//total vote count = 12 , min popular item = 12/8 = 3/2 = 1.