As you can see, I only solved problems A and B in ABC. The reason is that I consider competitions like ABC too easy and simply not worth my time. Therefore, I spent the remaining hour grinding through a small portion of Genshin Impact 5.5's new map. I believe this was more rewarding than participating in ABC.

The Div2 contest has ended, and I was extremely lucky to solve 5 problems.

I was 30 minutes late to this contest because I had to have my meal.

Problems ABC were straightforward. For problem E (extended Euclidean algorithm) and problem F (linear basis under GF(2) with Gaussian elimination), I happened to be studying these topics recently, so I managed to solve them by sheer luck.

I know many will accuse me of using AI—go ahead and say that. The truth will speak for itself.

Finally, Amao_Fox, our bet has been settled.

Hello everyone, I'm zhoujiarun.

In the recent Div.3 contest, I solved 4 problems and became a pupil. Thank you all for your support! Please congratulate me! I initially thought problem A had $$$n \leq 10^5$$$, which made me think for a long time, but the result was good.

Additionally, I want to clarify some matters.

Many people suspect I used AI. I need to clarify again:

1. My region cannot access ChatGPT without VPN technology. The only AI I can access is DeepSeek, but I don't think DeepSeek can solve 4 problems in Div.3.

2. Regarding the questions about my coding style, this is just how I code, and I won't change it.

3. Those who suspect I use AI should first surpass my rating before commenting. Of course, you'll need to wait until I've competed in at least 10 contests.

I believe solving 4 problems in Div.3 fully demonstrates my ability. Even though many of my Luogu solutions were inspired by others' ideas, I didn't copy-paste! I typed everything myself. During summer vacation, I set a record of solving 100 blue problems and 100 purple problems in 10 days (August 23rd to September 4th)! I believe this record is unbeatable. I hope my account can be unbanned if I solve 5 problems this afternoon.

Some think I'm intentionally collecting negative contribution. How is that possible? Who would want their account contribution to decrease? I don't know why so many people downvote my blogs or comments. I think this is just meaningless bandwagon behavior. Please stop this and upvote my blogs! Thank you!

Also, Amao_fox, we've completed 1/2 of our agreement. I'll prove myself with my skills this afternoon. I hope you won't break our promise.

I'll mention everyone who has ever followed me in this blog! I hope we can all witness my growth journey together.

YouKnowLog1e7 Amao_Fox SYCu EricWan 3.144285 luogu_official chen_zhe Lehe Register Mindeveloped Coffee_zzz

Finally, I want to clarify that the account zhouj1arun has nothing to do with me; it's probably just some bored people messing around.

Please reply to this blog post, regardless of the content. I will rate your name on a scale of [0,100]. Those scoring above 95 will qualify for an opportunity to join the Zhoujiarun fan club. If you are willing to provide your password, I will give you a detailed analysis of your name or account.

For example, I give the name zhoujiarun0216 a perfect score of $$$100$$$ points, and chen_zhe a score of $$$0$$$ points.

Below is a detailed example of name analysis.

Name Analysis: zhoujiarun (Score: $$$100$$$)

1. Euphonic Harmony：
   "Zhoujiarun" has a melodious rhythm with natural tonal balance, making it smooth and elegant both in speech and writing.

2. Structural Balance：
   The name combines "Zhou" (a monosyllabic surname) with "jiarun" (a bisyllabic given name), forming a three-syllable structure that excels in international appeal and modernity.

3. High Distinctiveness：
   The name is unique, rarely duplicated, and highly recognizable online, making it suitable for academic, professional, and social contexts.

4. Sunny and Positive Image：
   Evokes a first impression of reliability, intelligence, and approachability.

Name Analysis: chen_zhe (Score: $$$0$$$)

1. Nonstandard Formatting：
   The use of an underscore (_) is uncommon in Chinese pinyin names, often mistaken for a username, variable, or database field, stripping it of aesthetic legitimacy.

2. Phonetic Awkwardness：
   The abrupt transition between "chen" and "zhe" creates a disjointed rhythm, lacking the fluidity of "zhoujiarun."

3. Low Distinctiveness：
   "Chen" is a common surname, and "zhe" lacks uniqueness, leading to high redundancy and confusion in public settings.

4. Poor Visual Appeal：
   The underscore disrupts linear aesthetics, resembling code syntax or command-line inputs, devoid of cultural or artistic sensibility.

Scoring Criteria Summary:

No matter what, leave a comment below and upvote this blog post!

In the recent Div. 4 contest, I only solved two problems. Back then, I set a goal to solve three problems in the next Div. 1+2 contest. Many people mocked me, thinking it was impossible for me to solve three problems, but I did it! I spent about half an hour thinking about problem A and solved it, then another half hour on problem B. Surprisingly, problem D turned out to be so straightforward! I noticed that the XOR value of $$$x$$$ and $$$x+y$$$ remains constant. Based on this insight, I wrote the code and passed D on the first try. I truly succeeded! I hope that in the next Div. 2 contest, I can solve all four problems A, B, C, and D!

Please congratulate me!

Additionally, I hope that Luogu can unblock my account.