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Implement a Queue Using Two Stacks

Amazon● EasyNEW GRADONSITE INTERVIEW

Problem statement

Process a sequence of queue operations while using exactly two stacks as the queue's storage. Do not use a queue data structure.

The arrays operations and values have the same length. At position i:

The problem statement continues

Pro

Examples

Example 1

operations = ["push","push","peek","pop","empty"]values = [1,2,0,0,0]return = ["1","1","false"]

After pushing 1 and 2, both peek and pop observe the front value 1. Value 2 remains, so the queue is not empty.

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