wakanda-forever's blog

Apology: A mistake in 2241G
By wakanda-forever, 3 months ago, In English

Hello all,

As you might have already known, there is an issue with the problem 2241G - Сумматоха from Codeforces Round 1107 (Div. 3). The model solution was written in c++ and uses long long whereas the final answer can exceed long long limit and will not fit in it. This can cause an overflow.

The model solution has been fixed now. In case your solution passed pre tests, there is a very high chance it might fail system tests after the hacking phase. This is because the pre tests were weak in the sense that they didn't contain any case where final answer overflows. Only few official participants will be affected from this.

I would like to thank gerasikoff for pointing out this issue.

Finally, I would like to sincerely apologise for the mistake that has been done. I have overlooked the possibility of overflowing and it was not pointed out in testing as well. Again, sorry for the inconvenience caused.

  • Vote: I like it
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3 months ago, hide # |
 
Vote: I like it +17 Vote: I do not like it

wow

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3 months ago, hide # |
 
Vote: I like it +42 Vote: I do not like it

As a tester, I would like to apologize for my incompetence for not figuring this out :sad:

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3 months ago, hide # |
 
Vote: I like it +28 Vote: I do not like it

Feel free to use me as a downvote button instead.

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

Thanks for the quick update and for hosting such a fun contest! Mistakes happen, so don't sweat it and ignore the haters :)

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3 months ago, hide # |
 
Vote: I like it +75 Vote: I do not like it

As the person who found this bug, please give me contribution.

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3 months ago, hide # |
 
Vote: I like it +9 Vote: I do not like it

Hi, me and my friend Rayo had over 90 hacks but they were all removed, may I know why?

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3 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

me and my friend @Aizen__ hacked but all have been ignored... so hacks for G question womnt be considerd?

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3 months ago, hide # |
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Vote: I like it -6 Vote: I do not like it

I think that you should turn off hack for problem G bro. This affected a majority of in-contest submissions, not only a few ones.

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3 months ago, hide # |
← Rev. 2  
Vote: I like it -6 Vote: I do not like it

">:(" Because of this i don't able to do G XD

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3 months ago, hide # |
← Rev. 2  
Vote: I like it 0 Vote: I do not like it

ok so I was hacked.

Rank 4 -> Rank 38. RIP

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