The interview process was pretty welcoming. The interviewer process felt more like collaboration to solve a problem, instead of asking you a really hard question and just seeing you fail.

1. Robot log deduplication: The task is to deduplicate the same log information, which is generated multiple times within a set time window (e.g., 30 seconds).

2. Car control: You can give commands "accelerate" and "decelerate" to a car. Given a distance, return the shortest command sequence to reach that distance.

3. Card games: This is the easiest question. The most efficient solution involves a basic two-layer for-loop, checking the winning condition (based on hard-coded rules) in every iteration.