The interview process began with a phone screen with HR, followed by a coding interview, system design, resume review, and a behavioral interview.

I was treated rudely during the coding interview. The interviewers kept interrupting and questioning my implementation. At the beginning, I asked about boundary conditions as usual, and they impatiently answered, "You can pretend that there is no such situation."

After that, I was stopped before I even finished writing the code. They said they understood my thinking and did not need me to write test cases and run them. At this time, there was still a lot of time remaining, and they seemed to want to end the interview as soon as possible.

Medium-level questions in LeetCode usually have a statement about the business scenario. They usually involve top k problems, double pointers, and DFS.