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Grokking the Coding Interview Patterns in C#

Lowest Common Ancestor of a Binary Tree

Understand how to identify the lowest common ancestor of two given nodes in a binary tree. Learn to apply depth-first search methods to effectively solve this common interview problem and practice implementing your solution in a coding environment.

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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, ...