Recruiter reached out by email, followed by a recruiter phone call, then an hour-long technical phone interview.

The person interviewing me was fresh out of college but held a Staff Engineer title.

The interviewer fumbled finding a question to ask, taking just over five minutes to present it. They basically copy-pasted it without explanation, simply stating, "Given this input, this is what we want as an output."

The interviewer wasn’t paying attention. I had to ask a question while coding multiple times, and then they’d say, "Sorry, I didn’t hear your question."

I had the problem solved and also wrote several test cases.

Ten minutes after the interview, I received an automated rejection email.

Such a waste of time. It looks like the interviewer didn’t even try to understand the solution.

Stay away...

Given a list of strings, find the most co-appearing letters for each unique letter.