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Decode the Coding Interview in Java: Real-World Examples

DIY: Lowest Common Ancestor of a Binary Tree III

Explore how to find the lowest common ancestor of two nodes in a binary tree when each node has a reference to its parent. Learn to implement a Java function that efficiently traverses parent links to identify the LCA, helping you solve common interview problems involving binary trees.

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Problem statement

Suppose you are given two nodes of a binary tree node1 and node2. Your task is to find the lowest common ancestor (LCA) of these two nodes in the tree.

Note: The lowest node that has both node1 and node2 as its descendants (where we allow a node to be a descendant of itself), is called the lowest ...