nor's blog

Preserving Hash Code?
By nor, 21 month(s) ago, In English

https://nor-blog.codeberg.page/posts/2023-02-04-preserving-hash-code/

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21 month(s) ago, # |
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Hi I am not sure if I am the right person to answer all your queries, but I will still try to answer them to the best of my knowledge, hopefully someone can correct me if I am wrong somewhere.

  1. I asked this legal question internally (almost to every googler I personally knew who was contributing to Coding Competitions). Since this is not an everyday scenario, I do not have an absolute confirmation, although their responses kinda seemed on the positive side. I might need to ask a senior staff. Hopefully I will get some clarity soon, or someone experienced can help us.

  2. (& also 3) I had discussed with two of my friends about how we save Kick-Start and Codejam problems, and the only thing that came to our minds was creating a CF group and saving them one by one. It will need several active members contributing for that though, especially since time is short.
    We were inspired by something similar that has been done with IOI archives as well.

    Problem statements, tests(up to 2019-20) are already there. Solutions for most problems can also be obtained from ranklists itself. For testcases which aren't there, we considered 2 things:
    a. we request some respectable CPers to help us out
    b. we make a github repo where community could add issues for weak tests
    CF has also had Hashcode type contests in the past, so maybe we could include them here in a similar manner as well. Afaik Hashcode data-sets are already available, so added plus.
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    21 month(s) ago, # ^ |
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    I think writing scorers for Hash Code is quite a non-trivial task (and sometimes it might need a ton of computational resources, or the scorers for each subtask might be different). Do you know of a way to access all contest materials from the Hash Code side of things rather than writing things from scratch?

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21 month(s) ago, # |
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(un)rolling hash code 😔

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21 month(s) ago, # |
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and may have directly or indirectly inspired other such contests

AHC is directly inspired by topcoder's marathons.

While I agree with the sentiment that everything should be preserved. Especially the results. It's worth noting that HashCode problems are of a really bad quality and their educational value is next to none. Marathons/AHCs are way more useful. Sadly, marathons are already not preserved considering old marathons are inaccessible (including problem statements, results, solutions and forum posts).

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    21 month(s) ago, # ^ |
    ← Rev. 2   Vote: I like it 0 Vote: I do not like it

    Apologies for the misattribution, I had totally forgotten about marathons. Unfortunately I have never competed in one (and can say the same about a lot of other Hash Code participants), so Hash Code was the starting point for me and some tutorials that I remember seeing on related topics.

    Thanks for the reference by the way — from your comment it seems that it is a good idea to also dig up old marathons by coordinating with the topcoder staff/authors.

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21 month(s) ago, # |
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Google owns Kaggle and was supposed to store old Hashcode contests there, I recall. That would be nice.

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21 month(s) ago, # |
← Rev. 2   Vote: I like it +11 Vote: I do not like it

Thanks for having the same idea as my blog idea and representing it in a better way. Ofcourse people prefer some master posting this rather than a newbie! :cry: (referring to : https://codeforces.net/blog/entry/113194) But since this blog will do the same work, I am happy.

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    21 month(s) ago, # ^ |
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    I didn't know about your blog, it seems we wrote about it at the same time. Given that the difference in publishing time was just 8 minutes, and that I had to collect all relevant links and list out all possible issues, it should be clear imo.

    Anyway, I am glad to see that there are others who feel the same way.

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