The process was a bit long, with two technical interviews for each team I was interviewed for in parallel.

The first technical interview consisted of two coding questions with a time limit of 100 minutes.

Coding

Total time limitation is 100 minutes (for both questions).

List of logs in format: "User-id timestamp sign-in/sign-out"

maxSpan

If the delta (sign-out - sign-in) is smaller than max span, print the userid, sorted.

Userid & timestamp are digits 0-9.