I received an email with a few interview dates to choose from based on my availability. They covered all my expenses for the trip, and I had a full day of interviews before flying back. The day of the interview consisted of three parts:

• Case interview
• Technical interview
• Behavioral interview

The case interview wasn't very difficult, but it required common sense and logic. The technical interview started easy but became a bit more challenging, though still manageable. The behavioral interview was very straightforward. I was worried it might be awkward, but the interviewer was a great conversationalist, and we had a good discussion.

After the interviews, they gave all the candidates a campus tour, and then we headed to the airport. I received my offer just three hours after the interview concluded. Apparently, the interviewers met immediately afterward to decide who to hire.

How do you implement a queue using stack(s)?