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Problem · Graph

Course Order and Cycle

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Problem statement

There are numCourses courses numbered from 0 through numCourses - 1. Each row [course, prerequisite] means the prerequisite must be completed before the course.

Return a two-row result [order, cycle]:

The problem statement continues
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Examples

Example 1

numCourses = 4prerequisites = [[1,0],[2,0],[3,1],[3,2]]return = [[0,1,2,3],[]]

Course 0 is first. Courses 1 and 2 then become available, and the smaller course is chosen first.

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FastPrep Pro
Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 1 more worked example, explained
  • Guided hints and editorial
  • Run your code on real test cases
$9/month

Pro subscription, billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week