Not surprisingly, the actual interviews were very technical but mostly fair. The questions were primarily "can you figure out this tricky programming puzzle" type questions, which I generally enjoy, so there were no real surprises or problems.

The recruiting process, however, was surprisingly unprofessional from beginning to end. Some issues I encountered:

• Requests to attend a 4-hour interview with less than 24 hours' notice, with no follow-up confirmation (or response in the one instance where I had to reschedule).
• Being kept waiting for over 20 minutes after arriving 5 minutes before the scheduled time, with no apology or explanation.
• Being handed off between over 5 different recruiters for two positions. Most of the recruiters did not receive information from the previous recruiter, leading to requests to submit NDA and employment history information three times.
• After the interviews concluded, no one in recruiting contacted me for almost a week. I had to contact them, and they bluntly stated I did not get the job and could re-apply in one year.

I'm not bitter about not getting the job (really. I secured a nice position with an equally "popular" and thriving company shortly thereafter that will remain nameless). I am, however, disappointed with the treatment I received from their recruiting department, given the company's size and reputation.

I suppose the idea is that since everyone wants to work there, mistreating candidates makes no difference in the short term, as there are plenty of others waiting in line to interview. In the long term, however, assuming their recruiting department continues this way, I have no intention of interviewing there again. I've also convinced many other smart friends and co-workers considering this company not to interview as well.

Describe the process, including some code, on how to create a user identifier that could be passed between websites. This identifier should not be spoofed or easily stolen.

Write the code to determine if a 2D point is inside a 2D closed polygon.