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atodo's blog

By atodo, 6 months ago, In English

I hope you enjoyed the problems! You can give feedback on each problem and also choose your favourite below. This could help me and other problemsetters understand what type of problems you want to see on Codeforces.

1638A - Reverse

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Hint 3
Tutorial
Feedback

1638B - Odd Swap Sort

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Hint 5
Tutorial
Feedback

1638C - Inversion Graph

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Tutorial
Feedback

1638D - Big Brush

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Tutorial
Feedback

1638E - Colorful Operations

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Tutorial
Feedback

1638F - Two Posters

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Tutorial
Feedback

Now you can choose your favourite problem from the ones you solved during the contest or upsolved after it.

  • Problem A
  • Problem B
  • Problem C
  • Problem D
  • Problem E
  • Problem F

UPD: Don't forget to check out ak2006's video tutorials on his channel.

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  • Vote: I do not like it

By atodo, 6 months ago, In English

Hello, Codeforces!

I am happy to invite you to Codeforces Round #771 (Div. 2), which will take place on Feb/14/2022 17:35 (Moscow time). The round will be rated for participants with rating lower than 2100. You will have 2 hours to solve 6 problems. The problems were authored and prepared by me.

I would like to thank the following people who made the round possible:

I hope you have no plans for Valentine's Day find the problems interesting and enjoy the round. See you in the standings! ❤

Scoring distribution: $$$500-750-1250-1750-2500-3250$$$

UPD: Thanks to ak2006, video editorials for some of the problems will be available on his channel after the round.

UPD: Editorial is out!

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  • +661
  • Vote: I do not like it

By atodo, history, 14 months ago, In English

Hello!

Yesterday I participated in Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) and passed pretests on problems A, B, C, D, E during the contest. However, my solutions were not further evaluated on the main tests and they are still being displayed with "Pretests passed" in the submissions tab and as unsolved in the standings. This resulted in a delta of -302 :(.

I have never seen this before and I don't know what could have caused it. Does anybody know what went wrong or is it a bug? I'll also ping MikeMirzayanov, asking for help.

Sorry for writing an unuseful post but I don't know where else I should ask.

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  • Vote: I like it
  • +590
  • Vote: I do not like it