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PROGRAMMING CHALLENGES

Undo Feature Simulation

Difficulty:

2 Medium

2.3 Stacks

Topic:

A text editor uses a stack to implement the "undo" feature. Write a program that allows the user to enter text and then undo the last action using a stack. Implement this in pseudocode or Python.

A stack follows Last-In-First-Out (LIFO) order. Push each action onto the stack and pop the top item to undo.

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