The most professional and most organized interview process I have ever experienced.

The position was across the country, so the interview process began with a series of phone interviews. The first was an HR call, followed by two technical calls. I never waited more than two days after a phone call to receive a response. The amount of contact was terrific and never felt like I had been forgotten.

The first technical interview involved testing on the website through a screen-sharing program. The next technical call was more of a systems-level testing question.

Following those, I was flown out to the main office in SF for my on-site interview. I was given a schedule of interviewers and told there would be no coding. An hour after receiving my schedule (the night before the interview), I received another email stating there had been a slight scheduling change and that there would, in fact, be some coding during the interview. That was perfectly fine; though I had not prepared for it, they gave me enough notice so I didn't feel surprised the day of.

It was about six hours spent in the office. I got a tour, met many engineers, and was made to feel very relaxed. The process went well, though it was a long day. While making my travel arrangements, I mentioned that I had never been to SF before and asked if I could stay an extra day (which I would pay for). They were happy to oblige, and I even got my meals comped (within reason).

Ultimately, I did not get the position, but to be honest, I feel like I must have just missed it. I had a good feeling, but the entire process was so well-organized and professional that I know it's no one's fault but my own, and I would certainly try again. I wish more companies treated prospective candidates the way Dropbox does.

Write code to determine if the state of a tic-tac-toe game is solved.