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Solution: Longest Path With Different Adjacent Characters

Explore how to determine the longest path in a rooted tree where no two consecutive nodes have the same character. Learn to apply topological sorting and track longest chains from children nodes to calculate this path efficiently. This lesson walks you through building in-degree arrays, processing leaf nodes, and combining chain lengths to solve dependency-based path problems.

Statement

You are given a rooted tree with nn nodes, numbered from 00 to n1n - 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 ...