Hi everyone! As we're reaching the end of this year and as AI becomes smarter, I'd like to write such a blog, motivated by similar blogs by adamant, by tibinyte2006, by antontrygubO_o, by wuhudsm and by satyam343.

I am a member of the SUA Programming Contest Problem Setter Team, so most of the problems I authored are for the onsite contests prepared by our team. I would like to thank all our team members for discussing the problems with me, and preparing some problems for me after I attended work. What's more, I would like to thank them for being kind and supportive friends in my everyday life. Without them, my world will become dim.

It is astonishing to find out how many of these problems are related to my life. There are ideas from the (board) games I played, from the songs I listened to, and even from the places I've passed by. I can vividly remember how I came up with the idea, how I discuss it with my friends, how I learned new algorithms through preparing the problems when I wrote this blog. This is not just a collection of my problems, it even feels like a diary for my past years. I don't care about how smart AI might become, I just felt grateful that I had the chance to share my life with so many friends and contestants through these problems. Thank you, my dear competitive programming community, for giving me this unforgettable experience.

This is not a comprehensive list as it only contains publicly available problems. I'll try to update this blog each time after we make our new contests public. Also the ratings below are a (maybe very biased) estimation from my perspective, so it might not be precise.