They got back to me in 2 days and told me to do a 15-minute HackerRank challenge. The thing is, until now, I still don't know what the question was actually asking about.

The problem was supposed to be easy, but the description of the problem itself couldn't even fit on my 15-inch screen. By the time I finished reading the description (which was poorly written), I had 10 minutes to implement and debug, only to realize the question was asking for something else. This is especially not friendly to people whose first language is not English but who are excellent at solving problems.

If you want to hire the best coders out there, you need to cut down the problem descriptions and let us focus on the actual problem. This was the worst experience I've ever had.