How to implement a stack using queue?

How to implement a stack using queue?



A stack can be implemented using two queues. Let stack to be implemented be 's' and queues used to implement be 'q1' and 'q2'. Stack 's' can be implemented in two ways:

Method 1 (By making push operation costly)
Method 2 (By making pop operation costly) See Implement Stack using Queues

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