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Grokking the Coding Interview Patterns in JavaScript

Solution: Longest Path With Different Adjacent Characters

Explore how to determine the longest path in a rooted tree where no two consecutive nodes share the same character. Understand the use of topological sorting, chain length tracking, and combining child chains to solve the problem efficiently with linear time complexity.

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Statement

You are given a rooted tree with nn nodes, numbered from 00 to n−1n - 1, where the tree is connected, undirected, and has no cycles. The tree is represented by a 0-indexed array parent of size nn, where parent[i] is the parent of node ...