I'm not an opponent of AI, but I've noticed that some people are using the latest AI for shady race behavior. The video link below shows one such cheater while it replies with a slightly mocking emoticon to the skeptic in the video comments section. As a Chinese I am ashamed. Maybe we don't have an effective way to stop this kind of behavior today, but we shouldn't let this become a trend. Thank you for reading and I hope codeforces staff will do something about it.