Met with a recruiter on campus and signed up for an interview. The interview was very informal, and the interviewer came up with questions about some of my past experiences. After a few days, I heard back that they would like to do an onsite interview.

The interview was at their offices in NYC. There were three hour-long onsite interviews. I was told the topics of the onsite interviews would be, as well as the names of my interviewers, ahead of time.

The interviews were very pleasant, with about 30 minutes spent on technical problems and the rest on discussions about my experience or the company. After the interviews, I was taken out for coffee with two current employees for an hour.

A week after the interview, I heard back from Flatiron with an offer. They then scheduled three 30-minute reverse interviews for me to ask more questions of current employees before I decided on the offer.

Design an algorithm to solve this problem.