2434. Using a Robot to Print the Lexicographically Smallest String | Leetcode Daily - Python

Dive deep into LeetCode's 'Using a Robot to Print the Lexicographically Smallest String' problem! In this tutorial, we break down how to guide a robot to construct the smallest possible string according to dictionary order. Learn the core greedy strategy: by always knowing the smallest character still available in the input string, the robot can intelligently decide whether to add a character to its temporary holding stack or print the top character from its stack. We walk through an example, explain the Python code step-by-step (including how to efficiently track the minimum available character), and analyze the time and space complexity (O(N)). Understand when to prioritize printing from the stack versus fetching new characters to achieve the optimal lexicographical result.

Perfect for coding interview preparation and improving problem-solving skills.

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