• Bubble Cup 8 Booklet

    Dear competitors (and non-competitors),

    We are happy to inform you that we finished this year’s Bubble Cup Problem Set Booklet.

    You can download it here Booklet2015.pdf

    Best regards, … more

  • Bubble Cup 8 Results

    Dear Bubble Cup competitors,

    Thank you for participating in Bubble Cup 8. We congratulate you all and hope to see you next year.


    First place: 3/4 IOI Polish Team (Poland)

    Second place: … more

  • Official environment for Bubble Cup 8 Finals

    Dear Finalists,

    Here are the official compilers and environments available on the finals.


    Visual Studio 2015 (C++, C#)

    Free Pascal 2.6.4 (Pascal)


    Visual Studio 2015 … more

  • Bubble Cup 8 - Finalists List

    Dear competitors,

    This was a heated battle. Congrats to all and thank you for competing. The finalists list is announced below, with teams that earned their way to the BC Hall of Fame. … more

  • Bubble Cup Finals

    Round II is OVER! Congratulations to all competitors! Stay tuned, the finalists list will be announced on 1st June!

  • "Perfect Maze" available & round extended

    Problem "Perfect Maze" is available on SPOJ. Competitors can submit their solutions again.

    Due to issue with the problem, the second round is extended for 3 days. The round lasts until the end of 28 … more

  • Problem "Perfect Maze"

    Problem "Perfect Maze" has been removed from SPOJ problem set. We are looking into this. Meanwhile, the teams are advised to work on other problems.

    Backup statement of the problem "Perfect Maze" … more

  • Round I Results

    Round One has ended. Bubble Cup team has verified the submitted solutions and the first round results are now final.

    There have been several substantially similar submissions from different teams. … more

  • Round I End

    Round One ends today. Take a break before the second one starts!

  • Challenge problem

    Due to issues with the judge data, we are removing the challenge problem Man of Steel from the problem set. The new challenge problem is HQNP Incomputable Hard.

    All of the submissions for the … more