LeetCode 210: Course Schedule Ii — Step-by-Step Visual Trace

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Given a number of courses and their prerequisites, return the order in which courses should be taken to complete all courses, or an empty array if impossible due to circular dependencies.

Published 9 Apr 2026

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Given a number of courses and their prerequisites, return the order in which courses should be taken to complete all courses, or an empty array if impossible due to circular dependencies.
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