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Solution: Sort Items by Groups Respecting Dependencies

Explore how to solve the problem of sorting items grouped together while respecting dependency order. Understand the two-level topological sorting approach applied to item and group dependencies. Learn to build and use graphs to achieve valid ordering or detect cycles. Gain skills to tackle complex dependency sorting challenges relevant in coding interviews.

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] ...