LeetCode 94. Binary Tree Inorder Traversal in JavaScript (Stack-Based Solution)
00:00 - Introduction
00:07 - Whiteboard Walkthrough
04:59 - Edge Cases and Complexity
07:53 - JavaScript Code Implementation
12:07 - Conclusion
Welcome to LeetCode LevelUp!
In today’s video, we tackle LeetCode Problem 94: Binary Tree Inorder Traversal using JavaScript. This problem is a common interview question testing your ability to handle tree traversal using an iterative approach. We’ll solve it with a stack-based solution, which is both space and time efficient.
We’ll cover:
The problem statement and approach to solve binary tree traversal without recursion.
A whiteboard walkthrough of the stack-based solution and how it handles node traversal.
JavaScript code implementation to perform an inorder traversal and store node values in an array.
Key edge cases such as empty trees and trees with only one node.
Complexity Analysis:
Time Complexity: O(n), where n is the total number of nodes, as we visit each node exactly once.
Space Complexity: O(h), where h is the height of the tree, due to stack usage for storing nodes at each level.
This iterative approach is an optimal and widely-used solution for inorder traversal.
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