LeetCode 876. Middle of the Linked List in JavaScript

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00:00 - Introduction
00:07 - Whiteboard Walkthrough
02:10 - Problem Introduction and Edge Cases
03:46 - Code Implementation
06:27 - Outro

Welcome to LeetCode LevelUp!

In today’s video, we tackle LeetCode Problem 876: Middle of the Linked List, a common question in coding interviews. Using JavaScript, we’ll walk through an efficient solution using the two-pointer technique to find the middle node of a linked list in O(n) time and O(1) space.

We cover:

- Detailed whiteboard explanation of the problem, including edge cases like handling empty and single-node lists.

- A step-by-step JavaScript code implementation, using the slow and fast pointer approach to solve the problem.

- Best practices for optimizing your solution and strategies for coding interview success.

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Great video! I’m actually surprised by this solution. Intuitively, I’m thinking what if fast pointer reaches a node that points to another node behind/before the slow pointer? Would it still be able to detect the cycle?

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