SeyedParsa's blog

IOI 2017 is here!
By SeyedParsa, history, 7 years ago, In English

Hi, Codeforces! :)
I'm glad to say that IOI 2017 will begin officially tomorrow in Tehran, Iran!
During the event, we try our best to keep you updated with the news and medias and you can follow them on these channels:

And of course Codeforces, as a great community of relevant people!
So I invite participants to share their experience of the event here with #ioi2017iran.

Best of luck! :)
UPD1: Live coverage of the opening ceremony is now available at our Instagram and Facebook pages!
UPD2: You can see the live scoreboard of the contest Here!
UPD3: The online mirror round starts exactly one hour after the start of the official contest at Yandex.
UPD4: You can watch the Live Broadcast of IOI 2017 at youtube.
UPD5: All of the problems, with the translations, are now available Here.
UPD6: You can participate in the mirror contest of Day2 at Yandex.

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7 years ago, # |
  Vote: I like it +1 Vote: I do not like it

Auto comment: topic has been updated by SeyedParsa (previous revision, new revision, compare).

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7 years ago, # |
  Vote: I like it +30 Vote: I do not like it

Good luck for participants!!!

GL & HF.

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7 years ago, # |
← Rev. 2   Vote: I like it +9 Vote: I do not like it

Good luck Everyone.

Hope you do well :)

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

good luck guys :)))

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7 years ago, # |
  Vote: I like it +6 Vote: I do not like it

Unfortunately, the Egyptians were prevented from participating

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7 years ago, # |
  Vote: I like it +22 Vote: I do not like it

Here is the latest IOI 2017 contestant list with photos and Codeforces handles.

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

Will we be able to see live standings tomorrow?

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7 years ago, # |
  Vote: I like it +33 Vote: I do not like it

Will there be a live mirror for the contest or something like that ???

I really wanna know what would I have accomplished if I got to participate in IOI 2017.

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7 years ago, # |
  Vote: I like it +29 Vote: I do not like it

I was looking for the information about contest start in my timezone but I didn't find it so I created it by myself.

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7 years ago, # |
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Auto comment: topic has been updated by SeyedParsa (previous revision, new revision, compare).

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7 years ago, # |
  Vote: I like it +383 Vote: I do not like it

lol are you serious

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7 years ago, # |
  Vote: I like it +9 Vote: I do not like it

Is there any online live scoreboard?

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

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7 years ago, # |
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7 years ago, # |
← Rev. 4   Vote: I like it +91 Vote: I do not like it

Tired to wait? You can solve IOI 2017 Problem 2 right here! https://www.acmicpc.net/problem/1659

Also, we have a solution written in Korean, by former IOI winner! http://cubelover.tistory.com/8

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    7 years ago, # ^ |
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    fast af, as expected lol

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    7 years ago, # ^ |
      Vote: I like it +199 Vote: I do not like it

    ???: Hi , so to me seems like a notorious coincidence.

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    7 years ago, # ^ |
    ← Rev. 2   Vote: I like it +23 Vote: I do not like it

    I'm almost sure that the problem that appeared on the regional contest 10 years ago won't affect any contestant. Though it might be a subject of investigation if the IOI problem author was, let's say, inspired by the knowledge of the old version of a problem.

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

      Well maybe 10yr old regional don't matter much, but I sent that problem to snarknews for training camp recently.

      But yeah, our contestants were probably not affected — at least we didn't teach them in this year's camp, and there is no AC from them in online judge. As a tutor I'm feeling very sad now...

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      7 years ago, # ^ |
        Vote: I like it +19 Vote: I do not like it

      Also, I don't understand the idea of copying problem from the 2007 paper. Is it enough as far as contestants don't read the paper?

      http://cgm.cs.mcgill.ca/~godfried/publications/akiyama-chvatal-festschrift.pdf

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        7 years ago, # ^ |
          Vote: I like it +89 Vote: I do not like it

        I wonder how it feels to write a paper in a group of 8 people which is then posed on a contest for high schools students where it is solved by ~50 guys.

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          7 years ago, # ^ |
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          proud that their work helped ~50 high schools students got 100? :P

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            7 years ago, # ^ |
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            To be honest I don't expect most published papers to be very original. There is simply too much pressure on people to publish.

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    7 years ago, # ^ |
    ← Rev. 2   Vote: I like it +39 Vote: I do not like it

    I have seen similar problems more than one times. Here are some I can recall:

    • Seoul 2007 (same as yours)
    • APIO 2007 Backup
    • Local training of IOI 2010

    The problems mentioned above are old, but there is a even harder version of IOI P2 in recent USACO 2016 US Open Contest, and definitely some contestants like yutaka1999 (who is the rank2 of IOI day1 and rank1 in that USACO contest) had solved this one lol

    Problem: http://www.usaco.org/index.php?page=viewproblem2&cpid=650

    Solution: http://www.usaco.org/current/data/sol_landscape_platinum_open16.html

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

I think people make too big a deal out of "originality" of problems. A truly original problem would probably get solved by ~3 people (or less) and be irrelevant to the contest as a whole.

When I started competing I was really surprised by discussions where problems that (to me) looked like they were built around very obscure facts were described as "standard".

Any problem that gets solved by 20+ people at the IOI has to be related an existing problem/idea in some way.

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    7 years ago, # ^ |
      Vote: I like it +21 Vote: I do not like it

    Being original and being standard are different things.

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

      That's a good point, though I think that the difference is often quite blurry. I'd find it rather surprising if "wiring" was consciously copied from an existing problem.

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

    Any problem that gets solved by 20+ people at the IOI has to in some sense be "known"/be only a small modification of known ideas.

    You are an amazing competitor!

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      7 years ago, # ^ |
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      Do you think that isn't true? I'd be really surprised if it wasn't. Like what are the examples of some of the IOI problems that were solved by that many people where nothing similar has appeared before?

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

        lol I simply can't make any example beside ioi 2017 wiring / ioi 2014 wall / ioi 2011 race

        Maybe I was too lazy on solving other problems?

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

Hey SeyedParsa,

I've been trying to submit using java but the site shows only make2 which compiles only CPP solutions ...

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7 years ago, # |
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7 years ago, # |
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7 years ago, # |
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7 years ago, # |
  Vote: I like it +68 Vote: I do not like it

credit: Strongly Connected Memes for IOI Teens

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