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Grokking the Coding Interview Patterns in C++

Lowest Common Ancestor of a Binary Tree

Explore how to identify the lowest common ancestor of two nodes in a binary tree by understanding descendant relationships and applying depth-first search methods. This lesson helps you build solutions for common tree traversal problems and prepares you to implement efficient algorithms in C++.

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Statement

Given the root node of a binary tree with nn nodes, your task is to find the lowest common ancestor of two of its nodes, p and q.

Note: The lowest common ancestor of two nodes, ...