How to learn Lowest Common Ancestor (LCA) for coding interviews?

Master Lowest Common Ancestor (LCA) by understanding the core concept and practicing related problems. Key topics: lowest common ancestor, LCA, common ancestor, BST LCA, leetcode 236.

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Tree Traversal Patterns - DFS and BFS · 6 of 6

Lowest Common Ancestor (LCA)

Find lowest common ancestor in binary trees and BSTs using recursive and iterative approaches.

Topics

lowest common ancestorLCAcommon ancestorBST LCAleetcode 236leetcode 235

What you'll learn

•Core concepts and intuition behind Lowest Common Ancestor (LCA)
•Step-by-step implementation with code examples
•Time and space complexity analysis
•Common interview problems and variations

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Access the full theory, code examples, and practice problems.

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Other subpatterns in Tree Traversal Patterns - DFS and BFS

Preorder Traversal - Root-Left-Right

Master preorder traversal for tree construction, inversion, and path problems. Visit root before children.

Inorder Traversal - Left-Root-Right

Master inorder traversal for BST validation and kth element problems. Produces sorted order in BST.

Level Order Traversal - BFS

Master level order traversal using BFS. Solve zigzag, right side view, and level sum problems.

Postorder Traversal - Left-Right-Root

Master postorder traversal for tree height, diameter, and path sum problems. Process children before root.

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