Two technical rounds, each 45 minutes long.

I had to code, and the interviewer dry-ran the code each time, looking for edge cases where it could fail.

I haven't heard from them yet.

You enter a numbered door (say, door 1). This door leads you to a room that is again filled with doors (say, doors 2 and 3).

These doors lead to more rooms, and so on.

Given a room you are in and the list of doors within that room, you have to find the path to a target door.