After passing the phone interview (easy questions with the + and *), I was invited to the on-site interviews: one non-technical and two technical.

The non-technical interview also included a technical question, which was not easy.

Two more technical interviews followed. The questions were not too difficult, yet complicated. If you were off by a bit, they would probably not let you pass.

I provided good solutions to all questions, yet it took me a bit of extra time and some confusion in between, and they did not accept me.

I recommend everyone preparing to just go over all questions. You might get the easy ones and fail them because you practiced too hard on the difficult ones. True story.

• Meetings: Given start and end times for each, calculate the minimum number of rooms needed.
• VIP question: Find the person who is known to all but knows no one.