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Grokking the Coding Interview Patterns in Python

Sort Items by Groups Respecting Dependencies

Explore how to arrange items by groups while respecting dependencies and maintaining group continuity. This lesson guides you through the topological sort approach to solve complex ordering problems common in coding interviews, helping you handle prerequisites and grouping constraints efficiently.

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Statement

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

  • group[i] represents the group of the ithi^{th} ...