Why do we need make pushing efficient since in stacks push operation already O(1)

#1

why do we need make pushing efficient since in stacks push operation already O(1)

#2

hello @Shivani999
here we are implementing stack using queue.
so when we use queue to make stack we can either make our push operation efficient or our pop operation efficient but not both.
so for this problem u are asked to make push operation efficient.

#3

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