Rezwan.Arefin01's blog

By Rezwan.Arefin01, history, 6 months ago, In English,

Hello Everyone,
I guess everyone who is preparing for OI already know about this Checklist for OI Problems prepared by ko_osaga. I've been using this for quite a long time, and it is really helpful!

But since the checklist gets updated from time to time, I found it hard to migrate from the previous checklist to new checklist. So, I made the following web app for the same purpose! Now you don't need to worry about migrating, I can just add the problems to database and it'll update automatically!

Link: OI Checklist

Please find the features and changes to the main checklist bellow:

Features and Changes

  1. First of all, now the checklist contains direct link to each problem, while the main checklist had link to some parent of the link. And clicking on a contest name will lead to the official "Task" page of that contest, which generally contains judge data, editorial etc. In case this is not available, a related page is linked.

  2. Each category has a progress bar above it, so you can easily see how much you've solved.

  3. Many of us want to keep our checklist secret. Don't worry, you're checklist is always secret. However, you can share a static link your checklist.

  4. You can see statistics of a problem by hovering over the cell. Currently the statistics include the number of perfect scorer in official contest and the statistics that was given in IOI 2018, that is, the percentage of points that was scored at that problem during contest. So you can get used to this kind of stats.

  5. Toggling state of a problem is easy, just click on the cell. It will change state from unsolved to solving to solved.

  6. Some problems that are added in oj.uz but not available for public is marked in red. Since oj.uz shows that output only tasks is under testing, you can keep track of them. And problems that are not available or POI problems that doesn't have translation yes are marked in black.

UPDATE 1: As Benq suggested, now you can turn the state of a problem to an additional color: Blue. Meaning you already know the solution to the problem but don't intend to implement it for now. But the count of such problems will be added to solved problems for the status bars. The blue color is barely different from the green one as there is small difference between knowing solution and implementing it.

UPDATE 2: All USACO problems from session 2012-2013 to 2018-2019 are now added. Now the list contains 733 problems.

Hope you'll like it. What other features would you like to see?
(This is not well tested yet. If you find any bugs please let me know)

 
 
 
 
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6 months ago, # |
  Vote: I like it +24 Vote: I do not like it

Wish I could upvote more than once :(

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

hxrvyftw

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6 months ago, # |
  Vote: I like it +31 Vote: I do not like it

This is undeniably cool. Thank you very much!

Minor issue : CEOI Calvinball / Watering is not available in oj.uz. You can find it here.

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    6 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Thank you. Updated those two problems. Also CEOI13 Splot seems to be available as well, added that too (don't know it if is judge-able there, as there are no AC submissions).

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5 weeks ago, # |
  Vote: I like it +2 Vote: I do not like it

Update: Added problems from JOI 2019, JOISC 2019.
I am willing to add COI and infO(1) cup problems too. But I can only find COI14-18 in ojuz and COI06-09 in wcipeg. Is COI10-13 available somewhere?
And National Round problems from infO(1) cup 2017 is missing from ojuz. Will they be added?

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5 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by Rezwan.Arefin01 (previous revision, new revision, compare).

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5 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Will be EJOI problems added? And some problems get colored red on their own, I can't switch them to white

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    5 weeks ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    The red color means it is uploaded in oj.uz, but not made public yet (or maybe it is, but I don't know).
    And the black color means this problem is not available in any judge, or for POI problems it means translation not available.
    You can still mark these problems as solving/know solution/solved.

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

Great tool!

One feature request I have is if you could have an option to see all the problems from a certain contest sorted by solves so that it is easier to find problems at the right level.

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

    I had something like this in mind. But can't figure out on what basis I should sort the problems. Sorting by the number of perfect scores won't give correct idea I guess.

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4 weeks ago, # |
  Vote: I like it -24 Vote: I do not like it

I solve a question but it does not colored.Why?

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

    Who said cells will get colored on their own? And why are you even expecting it? Did the system ask your handles anytime?

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      4 weeks ago, # ^ |
        Vote: I like it -26 Vote: I do not like it

      I think if there will be thing like this it will be very good.

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

        I think that is not possible. As there are countless online judges where you can solve a problem. Also you may solve a problem in live contest. There is no way one can write parser for all judges. So you'll need to mark it yourself.