I had a brief time to introduce myself at the beginning of the interview, and then the rest was spent on a technical problem. The interviewer was collaborative and wanted me to think out loud and talk through my approach. I may have taken too long to get to the optimal approach on my own, but instead of prompting me to find something more efficient, the interviewer told me which approach I should take.

You're getting a list of event logs, composed of timestamps and events that happened at each timestamp. Write functions to access all of the events that happened:

• Before a given time
• After a given time
• Between two given times.