Quick Overview

Find the lowest common ancestor of two nodes in a binary tree represented by child-index arrays. The exercise evaluates tree invariants, ancestor edge cases, iterative traversal choices, and safety on a maximum-height tree.

Find the Lowest Common Ancestor in a Binary Tree

Company: Amazon

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: easy

Interview Round: Technical Screen

Overview: Find the lowest common ancestor of two nodes in a binary tree represented by child-index arrays. The exercise evaluates tree invariants, ancestor edge cases, iterative traversal choices, and safety on a maximum-height tree.

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