Balanced Binary Tree (LeetCode

Описание: In this video, we solve Balanced Binary Tree (LeetCode 110) using Swift and an optimized DFS approach. I show how to check if a binary tree is height-balanced by using a clever return value pattern that combines height calculation with balance validation.
This problem demonstrates the powerful "early termination" optimization pattern and how to design recursive functions that return multiple pieces of information efficiently.
📌 What You'll Learn:

Early termination patterns in recursive tree algorithms
Combining validation and calculation in single DFS pass
Using sentinel values (-1) for error propagation in Swift
Understanding height-balanced tree properties
Converting O(n²) naive solutions to O(n) optimized versions
Advanced recursive function design patterns

#Swift #LeetCode #BinaryTree #BalancedTree #DFS #EarlyTermination #Optimization #RecursiveDesign