Initial introduction, CodeSignal coding task with averagely hard questions. It would have been a fantastic experience because I enjoyed the task. The only problem that ruined the whole experience was that the CodeSignal compiler couldn't build C++17 code with a standard charconv header. I lost a lot of time implementing the substitute for it and didn't have enough time to fix the bug in the code. It took me literally 10 minutes to get things to work locally. I presented them with this issue, but they didn't seem to care and just told me it wasn't a good fit.