import java.util.*;

class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int m = sc.nextInt();
    
    double[] item = new double[n];
    double sum = 0;
    for (int i =0; i < n; i++) {
      item[i] = sc.nextDouble();
      sum += item[i];
    }
    
    double point = sum / (4 * m);
    
    int count = 0;
    for (int i = 0; i < n; i++) {
      if (item[i] >= point) {
        count++;
      }
    }
      
    if (count >= 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