Daily Coding Problem: Problem #92 [Hard]

Good morning! Here's your coding interview problem for today.

This problem was asked by Airbnb.

We're given a hashmap associating each courseId key with a list of courseIds values, which represents that the prerequisites of courseId are courseIds. Return a sorted ordering of courses such that we can finish all courses.

Return null if there is no such ordering.

For example, given {'CSC300': ['CSC100', 'CSC200'], 'CSC200': ['CSC100'], 'CSC100': []}, should return ['CSC100', 'CSC200', 'CSCS300'].

Upgrade to premium and get in-depth solutions to every problem, including this one.

If you liked this problem, feel free to forward it along so they can subscribe here! As always, shoot us an email if there's anything we can help with!

Master algorithms together on Binary Search. Create a room, invite your friends, and race to finish the problem!

No more? .