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Solution: Min Stack

Understand how to design a Min Stack data structure that enables push, pop, and retrieval of the minimum value all in O(1) time. Explore the dual-stack approach to efficiently maintain minimum values and practice implementing this pattern to enhance your coding interview problem-solving skills.

Statement

Design a custom stack class, Min Stack, allowing us to push, pop, and retrieve the minimum value in constant time. Implement the following methods for Min Stack:

  • Constructor: This initializes the Min Stack object.

  • Pop(): This removes and returns from the stack the value that was most recently pushed onto it.

  • Push(): This pushes the provided value onto the stack.

  • Min Number(): This returns the minimum value in the stack in O(1)O(1) ...