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Solution: Sort Items by Groups Respecting Dependencies

Explore how to sort items by groups while respecting interdependencies using hierarchical topological sorting. This lesson helps you manage both item-level and group-level dependencies effectively, enabling you to produce valid ordering sequences in complex coding scenarios.

Statement

You are given nn items indexed from 00 to n1n − 1. Each item belongs to 00 or one of m groups, described by the array group, where:

  • group[i] ...