First off, I apologize in advance if this was not the right place to post this.
Anyway...
I've just stumbled upon this website. I tried doing a mock interview that asked me to check if a number was a power of four. I did it easily and wrote the code in C++. The test cases showed that the code worked fine. There were no infinite loops or anything like that. When the time ran out, since I couldn't just submit it and had to wait, I got a message saying I would be redirected to a results page. After that, nothing happened. The page just froze. I refreshed the page and then it said the session expired and I never got my task accepted. Is this a common problem? Did I do something wrong? Is the page bugged? Thank you for your attention.