Elegia's blog

IOI2021 China Team
By Elegia, 4 years ago, In English

The China team selection ended today, the top 4 are:

Yu Haoxiang (yhx-12243),
Deng Mingyang (Rewinding),
Qian Yi (skip2004) and
Dai Chenxin (gtrhetr).

They will participate in IOI2021. Good luck!

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Comments Comments (53)
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4 years ago, # |
  Vote: I like it +123 Vote: I do not like it

Good luck!

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4 years ago, # |
← Rev. 2   Vote: I like it +412 Vote: I do not like it

Rating top 2 in China,Itst and jiangly,got rk5 and rk6 in the selection.

What a pity!

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    4 years ago, # ^ |
      Vote: I like it +51 Vote: I do not like it

    What a pity!

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    4 years ago, # ^ |
      Vote: I like it +48 Vote: I do not like it

    Can they compete next year?

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      4 years ago, # ^ |
        Vote: I like it +90 Vote: I do not like it

      No, they will be freshmen next year.

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      4 years ago, # ^ |
      ← Rev. 2   Vote: I like it -56 Vote: I do not like it

      Actually, if anyone doesn't get a gold medal and won't enter the university next year, he can take part in the competition again.

      However, Itst and jiangly is already in Grade 3, so they will be freshman and have no chance :)

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    What a pity!

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    4 years ago, # ^ |
      Vote: I like it +127 Vote: I do not like it

    Can't wait to see China host a future IOI and their unofficial team casually bag another 4 golds.

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      3 years ago, # ^ |
        Vote: I like it +12 Vote: I do not like it

      Imagine if they write all the questions

      Every question is going to be persistent segment tree with multiset nodes proceeded with moebius inversion + MTT 7 times + constant optimisation + some new algo no one has seen yet + data structure

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    3 years ago, # ^ |
      Vote: I like it +10 Vote: I do not like it

    What a pity!

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4 years ago, # |
  Vote: I like it +161 Vote: I do not like it

Wish everyone good luck!

Btw, Deng has already got a medal in IMO lol

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4 years ago, # |
  Vote: I like it +105 Vote: I do not like it

strong!!

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4 years ago, # |
← Rev. 2   Vote: I like it +123 Vote: I do not like it

What a pity that 5LGMs took part in the last contest，but only one is selected.

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4 years ago, # |
← Rev. 2   Vote: I like it +45 Vote: I do not like it

Sorry to ask this but I am really amazed,
Q.1> but how China has so many reds,
Q.2> like from what age you guys prepare,
Q.3> do u guys have any maths background from before, or just training camps from seniors help you to achieve that,
can you describe the cp culture in china.
Q.4> Also, how do u guys train???
Q.5> Also China, Russia,USA are always at top in IMO,IOI. Any specific reason behind this.

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    4 years ago, # ^ |
      Vote: I like it -72 Vote: I do not like it

    1) Because of their education system, unlike the Indian one. 2) Varies from person to person 3) idk 4) idk 5) Chinese and Russian books, unlike Indian NCERT Books, are designed in a way to provoke thinking and improve mathematical logic. I once took a look at the Russian books and the problems are so good, moreover, Chess, one of the most thought-provoking games is made compulsory in Russia.

    Though I'm an Indian, I feel these are the main reasons why India lags behind Russia and China in almost all olympiads.

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      4 years ago, # ^ |
        Vote: I like it +146 Vote: I do not like it

      This has to be one of the most useless detailed replies ever.

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    4 years ago, # ^ |
      Vote: I like it +14 Vote: I do not like it

    Let this remain the secret of top Chinese and Russian competitors.

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    4 years ago, # ^ |
      Vote: I like it +54 Vote: I do not like it

    I once ran the numbers and many Eastern European and East Asian countries have pretty similar "grandmaster per capita" ratios to Russia. China just sticks out because it is big enough so that the statistics alone guarantee enough people with strong gold medal and LGM potential every year.

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      4 years ago, # ^ |
        Vote: I like it +3 Vote: I do not like it

      Could you post the statistics? I'm genuinly curious which country would have the highest ratio

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        4 years ago, # ^ |
        ← Rev. 2   Vote: I like it +114 Vote: I do not like it

        Antarctica, then Samoa, then Croatia.

        The data is here.

        There are some things to keep in mind here, though:

        • This is from September 2020, not right now.
        • The data is pretty unreliable and can fluctuate a lot due to the small number of grandmasters, especially for small countries. The most interesting part is countries that have >5 grandmasters. Counting master+ would probably give us a fuller picture.
        • This is Codeforces-only, which adds a bias because of timezones and other things. In particular China could be noticeably underrepresented (but I doubt that it could rise that much). I also didn't count people who have not set their country on Codeforces, even if I know what country they were from.
        • I don't remember where population data came from, take it with a grain of salt please.
        • This is grandmasters per capita. It would perhaps be more interesting to see "grandmasters per person aged 15-25", which wouldn't be the same because countries have massively different population pyramids.
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          4 years ago, # ^ |
          ← Rev. 2   Vote: I like it -10 Vote: I do not like it

          Question: Did you input the raw data manually?

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          4 years ago, # ^ |
          ← Rev. 2   Vote: I like it +5 Vote: I do not like it

          Croatian population pyramid:
            ____
          /         \
          \         /
            \     /

          :(

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          4 years ago, # ^ |
            Vote: I like it +13 Vote: I do not like it

          If someone wants to run the numbers again, I would also suggest to use max rating and include also inactive users. For example Finland has 6 GM if counting max rating and inactive, but only 2 active current GMs.

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    4 years ago, # ^ |
    ← Rev. 2   Vote: I like it +55 Vote: I do not like it

    There are many factors that contribute to the differences between countries, but the burden of hard work is still mostly on the individual. For example, in the US:

    Q2,Q3,Q5: Most USACO students have a strong math background, the earlier the better. There are many math camps, contests, olympiad training programs, etc. Requires some guidance and motivation from parents.

    Q3,Q5: USACO contests and camp are very helpful in guiding learning. There is not as much interest in competitive programming as there is in math olympiads, but fortunately the jump from math to competitive programming is not too large. Again, requires some guidance from parents to learn programming and prioritize these contests.

    Q1,Q4,Q5: Any competition requires hard work and practice. Guidance helps, but only to a certain degree. There is no quick and easy hack.

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    5 -> Hint: Look at their popluation!

    Also Iran got really good results in IOI!

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4 years ago, # |
  Vote: I like it +116 Vote: I do not like it

Congratulations！ dlstsdy！

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4 years ago, # |
  Vote: I like it +14 Vote: I do not like it

Todo lo mejor, equipo de China.

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4 years ago, # |
  Vote: I like it -32 Vote: I do not like it

Predictions: 4 Gold medals Just look at their rating graphs do you see something common/weird?

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    4 years ago, # ^ |
      Vote: I like it +37 Vote: I do not like it

    practicing in a secret/less known Chinese OJ for years, then reaching high ranks after a short amount of time?

    that seems pretty common for the Chinese tbh

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4 years ago, # |
  Vote: I like it +15 Vote: I do not like it

How are Chinese guys so godly?!! Wow!! I wonder how you guys practice!

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

We should have a China B in IOI. Even they would finish in top 10 in country standings

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    4 years ago, # ^ |
      Vote: I like it -13 Vote: I do not like it

    then what if they host an IOI? there will be 3 Chinese teams? It's pretty unfair, I think. The USA and Russia do have a lot of talents, too.

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      4 years ago, # ^ |
        Vote: I like it +5 Vote: I do not like it

      I participated twice in IOI. I couldn't help feeling that I'm stealing someone's place. :( There are so many eligible programmers who are talented than me and I get to participate because our country does not have many competitive programmers

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4 years ago, # |
  Vote: I like it +106 Vote: I do not like it

China IOI team to other countries team
be-afraid-be-very-afraid

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4 years ago, # |
  Vote: I like it +10 Vote: I do not like it

Congratulations!Hope China team will succeed again just as what they did last year.

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4 years ago, # |
← Rev. 2   Vote: I like it +5 Vote: I do not like it

Congratulations to them and whish them good luck in IOI 2021!

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4 years ago, # |
← Rev. 2   Vote: I like it +22 Vote: I do not like it

Congratulations! As a Chinese OIer, I sincerely hope that the Chinese IOI team can have good luck and do well in the upcoming IOI2021!

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4 years ago, # |
  Vote: I like it +105 Vote: I do not like it

Isn't Rewinding the first Chinese contestant to get to both IOI and IMO ? At least in the last 10 years.

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    4 years ago, # ^ |
      Vote: I like it -22 Vote: I do not like it

    gamegame is hk but should count

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      4 years ago, # ^ |
      ← Rev. 2   Vote: I like it -10 Vote: I do not like it

      absolutely! gamegame is a proud Chinese contestant who will win IOI 2021

      gamegame thank you for adding me as a trusted user!

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        4 years ago, # ^ |
          Vote: I like it -15 Vote: I do not like it

        why are we downvoted lmao didn't harris leung get to ioi and imo? or is hong kong not counted as part of china now .-.

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4 years ago, # |
← Rev. 2   Vote: I like it +14 Vote: I do not like it

Expecting gold medal from these guys. Chinese dominate all brain-related competitions. Even the teams from countries like USA, Canada and Australia consist of almost all members of Chinese/Taiwanese origin.

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4 years ago, # |
  Vote: I like it -19 Vote: I do not like it

cheem me cant becom purpol

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4 years ago, # |
  Vote: I like it -16 Vote: I do not like it

Everyone good luck! Get 4 gold medals this year!

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3 years ago, # |
← Rev. 2   Vote: I like it -50 Vote: I do not like it

emmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

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3 years ago, # |
  Vote: I like it -7 Vote: I do not like it

After IOI 2020, now I feel that China team selection is harder than IOI itself :v

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