BucketPotato's blog

By BucketPotato, history, 5 months ago, In English

As the title suggests, there will be a lockout tournament targeted towards pre-college students, organized by (in no particular order) lethan3, ezraft, PurpleCrayon, GusterGoose27, Apple_Method, codetiger927, qpwoeirut, clcos, jamster, and izhang.


The opening ceremony will start April 29 around 10:30 AM Pacific time (click the link to see the converted time), where tournament specific rules and the structure will be announced.

It will last for an expected 4 hours. You can check the website for more details.

All problems for the lockout matches will come from the Codeforces problemset, so the starting time may be modified depending on how fast system tests for round 869 go.

Who can participate?

The main tournament is intended for precollege participants.

Non-precollege participants can join to spectate or play some casual matches.

How to participate?

Join the Discord server. Also see the website for more information.



Again, for more details, please visit the website or join the Discord server. Most logistics will be handled through the latter.

Also, SecondThread will be streaming and commentating the tournament! The link will be added here tomorrow.


We would like to congratulate the winners of the Lockout Tournament Official (Pre-College) Division:

  1. Dominater069

  2. amoeba1

  3. skittles1412

  4. oursaco

  5. Adam_GS

  6. hazzler

  7. Dewi

  8. One

And we would like to congratulate the winner and the only present participant :flushed: of the Unofficial Division:

  1. ScarletS

Check out the recording of the livestream here!

Thank you, participants, for such a successful tournament! We hope you enjoyed dueling with us and had fun!

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By BucketPotato, history, 14 months ago, In English

Some stats about the round

Pre-contest predictions
Who did what?


Problem A


Problem B


Problem C


Problem D1


Problem D2


Problem E


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By BucketPotato, 14 months ago, In English

Hi Codeforces,

We're excited to invite you to Codeforces Round 809 (Div. 2), which will take place at Jul/18/2022 17:35 (Moscow time). All problems were created and prepared by lunchbox, lce4113, and me. It will be rated for all participants with ratings lower than 2100.

Thanks to the people that made this round possible:

You will be given 2 hours to solve 5 problems, one of which will be divided into 2 subtasks. The scoring distribution will be announced later.

UPD: The scoring distribution will be $$$500 - 1000 - 1250 - (1000 + 1250) - 2250$$$.

UPD2: The editorial has been posted at https://codeforces.com/blog/entry/105008.

UPD3: Winners


  1. WYZFL
  2. c8k
  3. tiger1926
  4. b6e0
  5. iztrax


  1. tourist
  2. SSRS_
  3. WYZFL
  4. Rubikun
  5. noimi

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