Round 1
Questions: This was the problem: Search Suggestions System.
I answered it flawlessly, passed all edge cases and debugging. Then there was a variant about optimizing suggestions (towards the end of the interview) I couldn't come up with the exact one he wanted.
Candidate's Approach
I provided an optimal code solution with the correct runtime and working solution for the initial problem. I also suggested one optimization, but it did not meet the interviewer's expectations.
Interviewer's Feedback
The interviewer seemed focused on achieving 100% perfection, which contributed to a challenging experience.