import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz