The Build Order

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Given n modules (0..n-1) and a list of [a, b] edges meaning a depends on b (b must be built before a), return a valid topological build order. Return [] if a cycle exists.

Summary

Some tasks must wait for others to finish first.

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