I never got to speak to a recruiter.

Before they even phone screened me, they sent me a three-hour coding test. I thought this was a bit absurd, as this is a long amount of time to spend so early in the process, but I eventually decided to do it.

I completed it and passed all the test cases, except for a couple of efficiency ones. Today, I received a pretty automated message declining me from continuing the interview process.

After spending three hours of my time, they denied me without the decency of providing feedback. This is inconsiderate and a true waste of candidates' valuable time.

I highly recommend avoiding interviewing for these positions unless the process improves.

Three abstract scenarios:

Implement the solution in C.