DecayingSylow's blog

By DecayingSylow, history, 4 months ago, In English

Today I opened Luogu for the first time.

  • On Luogu, if you practice with *3000 rated Codeforces problems, you are not an International Grandmaster, you are "NOI-" ("National Olympiad in Informatics minus"?). So the average Chinese IGM knows he is not so competitive at the national level (skill issue) and he must tryhard to reach "NOI", "NOI+" and "CTSC" level.
  • There are a lot of editorials written by contestants (about $$$10$$$ for each problem), which can be better than the official editorial. This holds for both easy and hard problems. Learning from Luogu editorials seems fun!
  • The community is not toxic at all! If the tests in a problem are weak, according to Luogu users the reason is not "the author is retarded", but "the author is still too young" (i.e., $$$11$$$ years old).

If you wish to become LGM, of course the first step is creating an account on Luogu.

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4 months ago, # |
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the first step is to learn Chinese

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    4 months ago, # ^ |
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    You can use a translator!

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      4 months ago, # ^ |
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      unfortunately the translation is usually not too comprehensive

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        4 months ago, # ^ |
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        use chatgpt to translate stuff, it should result in a much more comprehensible translation

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    2 months ago, # ^ |
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    Maybe you don't have to learn Chinese after a short period of time. The discussion in luogu (which is in Chinese) told us Luogu is starting to internationalize (however presently we cannot use Luogu Global). The translation of this discussion is as follows:

    2024.02.06 Announcement

    We are currently undergoing significant updates to Luogu. During this period, there may be intermittent access issues and various bugs. We appreciate your understanding.

    The planned updates are as follows:

    • Enabling the luogu.com domain as the global domain for Luogu.
    • Launching an article section in Luogu Global, discontinuing Luogu Blogs; content from Luogu Blogs will be fully migrated to the article section. The solution feature will not be affected.
    • In Luogu Global, users will be able to view discussions, clipboards, user profiles, and other information, but due to servers being located outside of mainland China, speed may be slower and there is a possibility of being blocked in mainland China.
    • Luogu Mainland will no longer display any unverified public UGC content, and the Luogu community will primarily move overseas.
    • In the next steps, Luogu will gradually implement:
    • Luogu Global will provide a multi-language version of the user interface along with corresponding user systems.

    • Problem statements will also allow multiple languages. Initial translations will be done by AIs. Users can also contribute versions in multiple languages.
    • Meeting the training needs for ICPC, such as team formation, virtual participation, and archiving and filtering official contests (gyms). ICPC awards can be authenticated.

    Unfortunately, due to policy reasons, we cannot keep the community in mainland China. We wish the Luogu community overseas a new beginning.

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    2 months ago, # ^ |
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    According to official information, Luogu is preparing to provide a multilingual version of the user interface

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      2 months ago, # ^ |
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      However, Luogu's main users are Chinese, so the discussion area still focuses on Chinese communication.

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4 months ago, # |
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first step is to know..what for loop is?

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4 months ago, # |
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From my understanding of the difficulty level, "NOI-" means easy problems in NOI level. It is not really "you can't qualify for NOI". But since most of them are like >=IGM if they qualify for NOI, it can be considered like ~*2400-*3000 if it is NOI-

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4 months ago, # |
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Why not just start doing this on codeforces as well?

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4 months ago, # |
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Having seen multiple Chinese contestants getting to red rating in a span of a few months or maybe a year, I was always curious about how you practice in China. Do you think Luogu problems are maybe better than CF? Also, there is a page called Questions Bank (题单) and there appear to be some educational problems on things like arrays, math, structures, graphs, trees, DP etc. Do you think they are worth solving?

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    4 months ago, # ^ |
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    I am not from China, but I can say that it is not so difficult to get a high rating (CM, Master...) if you have a good background in Olympiad maths, maybe in some CS subject. For example, I became an expert from the first time without knowing more or less any algorithm. And i also doing CP only $$$1$$$ year.

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      4 months ago, # ^ |
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      I completely agree with what you're saying, it's also the reason why I started doing more math in terms of practicing CP than actually solving CF problems. But I'm quite curious about Luogu and the quality of problems and editorials, as I have now seen that indeed there are multiple people explaining their solutions to pretty much every problem I selected (even the most basic ones) and it's quite nice to have so many different perspectives. Also, there are mashups for specific topics like graphs or DP, which I haven't started learning about yet.

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        4 months ago, # ^ |
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        In luogu you can get "contribution" by posting editorials for problems instead of blogs, and the color of your handle has to do with such "contribution", instead of "luogu rating".

        Some people post editorials just for the "contribution" and what's worse some editorials are just copied from others and the writer even didn't solve the problem....

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          4 months ago, # ^ |
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          Sometimes it's true, but most of the time it's not like that. Most of the time, the editorials of Luogu users are written by themselves

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          2 months ago, # ^ |
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          I love luogu.

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          2 months ago, # ^ |
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          Usually, luogu administrators will delete these "meaningless" and "plagiarism" content, and even ban the accounts of the authors of these contents.

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            2 months ago, # ^ |
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            Luogu coordinators are quite consistent with punishment on cheaters. Cheaters get a brown handle as a warning, and in more serious occasions have ratings reset or even all AC records wiped out.

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    4 months ago, # ^ |
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    It all comes down to your own preference. Luogu-made problems are kinda confusing for me, compared to codeforces problems. Currently I practice on Luogu to search for problems (possibly codeforces problems/atcoder with translation) because of the user editorials and that the tag searching is much more efficient.

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    4 months ago, # ^ |
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    Well, maybe they've already had another account which is LGM:)

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    4 months ago, # ^ |
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    Luogu problems aren't better than CF. However, there are many "template" problems (like segment tree) on Luogu, which may help us study better.

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    2 months ago, # ^ |
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    The rating on Luogu is different from the codeforces because it is not a match level score.

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      2 months ago, # ^ |
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      Luogu has two "rating" systems. One of them is named "guzhi", and that's what you said. But the other is named "elo rating", and that's "a match level score".

      You can refer to here (Chinese only).

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        2 months ago, # ^ |
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        I am from China. But the name and color of Luogu are related to "guzhi" and not to elo rating.

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4 months ago, # |
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Luogu users are mainly 12-17, They study from 6:50am to 10:00pm, Are we working that hard?

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    4 months ago, # ^ |
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    That is also excluding the fact that some schools even have something called "晚自习", meaning that school students will have to stay back at school until night time to study. It is compulsory for many schools.

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Actually some Chinese OIers in luogu are not so friedly. They are crazed and trying to attack others.I recommend waiting for luogu to launch a fully internationalized community before joining.

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    4 months ago, # ^ |
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    I havent seen anyone toxic lol, most people will even point out errors in the user editorial. Actually, I've seen many more toxic users in codeforces than luogu. There are many people that are attacking others in codeforces (maybe because there are too many users who come from all over the world). Nevertheless, orz codeforces

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      4 months ago, # ^ |
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      many people in codeforces who always attack others are just for the contribution lol, attacking is the fastest way to get downvoted :(

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    4 months ago, # ^ |
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    What do you mean? You can still practice problems on the platform without discussing and chatting in the community. (In fact, due to Chinese authorities' policy, foreigners cannnot even comment)

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      4 months ago, # ^ |
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      Bind your phone number may help?

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      2 months ago, # ^ |
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      Luogu is currently being updated, and foreigners will soon be able to use all the features

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    4 months ago, # ^ |
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    Just ask some complex questions in English. Pupils won't bother you.

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    2 months ago, # ^ |
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    We usually refer to them as xxs. Enabling academic mode and not participating in community discussions can effectively block them

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      2 months ago, # ^ |
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      isn't xxs Chinese abbreviation of "primary school students"?

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        2 months ago, # ^ |
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        However, in the current Luogu community, it is often used to refer to those who are mentally immature

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4 months ago, # |
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bro,please tell me how much Luogu pays to you.Let's get money together!

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4 months ago, # |
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I love Chinese language.

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4 months ago, # |
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actually,I know a person who can solve *3500 easily and he's only 15 years old

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4 months ago, # |
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Maybe the advice is for Chinese. If you are not a Chinese, you may need to learn Chinese first.

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    2 months ago, # ^ |
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    Luogu is preparing to provide a multilingual version of the user interface

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Indeed, there is a multitude of editorials.

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They are just gifted,good at math

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4 months ago, # |
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There are both advantages and disadvantages in Luogu. I think the statements of some of the problems are unclear and difficult to understand. But the "Template" problems are good.

P.S. pupil Chinese.I'm TOO weak.

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4 months ago, # |
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So let me just explain this. Luogu just a site use to practice your programming.(Rubbish Talk!!!) If it's normal, nothing usually happens, but when some students copy the solutions and insult the administrators, a world war may break out in Luogu.(Some example: https://www.luogu.com.cn/discuss/61884, this tough man can let 11 (valuation) admins come out and ban this student)

BTW, you can join a race like Codeforces called Caféforces https://www.luogu.com.cn/contest/147008

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    2 months ago, # ^ |
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    You are wrong.Here's why.The one created discussion 61884 didn't create it himself.Somebody(maybe his classmate) used his account to copy the solution of P4118 and created that discussion.It's called "JFCA"(机房惨案) in Chinese.

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      2 months ago, # ^ |
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      @UnKnowErorr : How to learn science?AC this problem.Have a good luck. "luogu will have a bad reputation","luogu administrators is supreme","Everybody will know what luogu administrators did!" P.S:My English is very bad.

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    2 months ago, # ^ |
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    Doesn't Codeforces have these things? Example: CF version of luogu discuss 61884, xlpg0317's rubbish blogs & comments

    Luogu usually punishes some contests and problemsetters if the contest is bad, for example preventing them from problemsettings. Luogu punished 8 contests in 2023, but Codeforces did not even publish a clarification after Goodbye 2023 with the blog having 4500+ downvotes!

    Off-topic: I got rank 2 in Caféforces round 2. (In fact, there are also some other codeforces style contests on luogu.)

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3 months ago, # |
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I registered three accounts on Luogu but I still incompetence now.

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3 months ago, # |
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Because they dont watch hornpub and complete their maths homework on time

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2 months ago, # |
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Luogu is becoming an international website.Here is why.

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Luogu is updating towards internationalization.

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In the next step, Luogu will gradually realize:

  • Luogu will provide a multilingual user interface. and the corresponding user system.

  • The questions will also allow for multilingualism. Initially, multilingual translations were done by LLM. Users can also contribute versions in multiple languages.

  • Suitable for ICPC training needs, such as teaming, virtual participation, archival screening of official competitions (gyms), etc. ICPC awards can be accredited.

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2 months ago, # |
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Luogu: where coding prowess meets humility

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2 months ago, # |
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Actually if the tests in a problem are weak the reason is not "the author is retarded" but "the data was made by CCF" or "the data was made by feet"

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2 months ago, # |
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I'm sorry for my poor English. Part is written by the translator.
In fact, some of the difficulty of questions from Luogu "Codeforces Remotejudge" area are inaccuracy or even judged maliciously, and this historical legacy is still being dealt with. You could even find *2300 with difficulty "NOI/NOI+/CTSC"(level 7, the max level on luogu) and *3000 with "省选/NOI-" (level 6) on luogu 5 months ago.

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2 months ago, # |
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I am a Luogu user.

Actually,I guess Luogu will be much fun than before,if so many high level OIers in codeforces can join in it!