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 $O(1)$ time.

Note: The time complexity of all the methods above should be $O(1)$ . ...