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Grokking the Coding Interview Patterns in C#

Solution: Longest Path With Different Adjacent Characters

Explore how to determine the longest path in a rooted tree where adjacent nodes have different characters. This lesson guides you through using topological sorting, tracking chains from child nodes, and combining these chains at parent nodes to efficiently solve the problem with optimal time and space 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 ...