I have thought about it for a while, and I'm not really sure what is the best way to:
1.Implement a stack using 2 queues.
2.Implement a queue using 2 stacks.
I have only though about something trivial that takes O(n) time for dequeue and enqueue, and O(n) time for push and pop.
Can I do better than that? Are there more efficient ways to do 1 and 2?
