Скачать или смотреть Leetcode 227 Basic Calculator I - Stop Overcomplicating! (2025-11-21 001)

🔥 LeetCode 227 — Basic Calculator II | O(n) Solution Explained!

In this video, we walk through LeetCode 227: Basic Calculator II, a popular string-parsing problem that tests your ability to simulate arithmetic without using eval().
I show you a clean O(n) time complexity solution, step-by-step, and explain how to handle + - * / operations correctly while respecting integer truncation rules.

Whether you're preparing for interviews or sharpening your coding skills, this breakdown will help you understand both the logic and the implementation strategy.

⭐ What You’ll Learn

How to parse a string expression correctly
How to handle operator precedence without using a stack of stacks
Why this solution is O(n) and efficient
Common mistake patterns to avoid
Walkthrough with examples: "3+2*2", "3/2", "3+5/2"

💻 Code (included in video)
Clean implementation
Easy-to-remember pattern
Interview-ready


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