I had a ridiculous interview with Groupon. Some of the interviewers did not seem to have prepared at all. The last interviewer just threw me a complicated question with no further explanation. I tried to solve it using DFS, and she was not satisfied with my answer and asked me to improve it. I knew I should probably use a greedy approach, and while I was still thinking about it, she ended the interview. The last round was only 30 minutes, though it should have been an hour.

I just got a call from HR asking if I was really considering their company, because I told the interviewer I was also interviewing with other companies. Both HR and the interviewers acted very unprofessionally and seemed not to be taking this interview seriously. It was really disappointing since I flew nine hours to Seattle and another nine hours back.

LeetCode questions

Easy system design question