public static int cookies(int k, List<Integer> A) {
    // Write your code here
    PriorityQueue<Integer> pq = new PriorityQueue<>();
    int operations=0;
    for(int a: A)
    {
      if(a<k)
      {
        pq.add(a);
      }
      
    }
    if(pq.isEmpty())
    {
      return 0;
    }
    while(!pq.isEmpty())
    {
      int a = pq.remove();
      if(!pq.isEmpty())
      {
        int b=pq.remove();
        int res = a+2*b;
        if(res<k)
        {
          pq.add(res);
        }
      }
      operations++;
    }
    return operations==A.size() ? -1 : operations;
  }