Singularity Cup

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Welcome to the first ever Singularity Cup!

The contest organizer is Mystical.

Thanks to BalintR, Dormi, Riolku, dxke02, Snowfall, and ostrichthattypes for testing and feedback on problems.

This round will be rated for all participants.

There will be a $100 CAD cash prize for the first place competitor, which will be sent by e-transfer or PayPal.

Before the contest date, you may wish to check out the tips and help pages.

This contest will consist of 6 problems, the difficulty of which may range anywhere from CCC Junior to CCO level.

You will have 3 hours to complete the contest. After the contest window begins, you may begin at any time. Once you enter the contest, your personal timer will start counting down and you will be able to submit until 3 hours from when you started, or until the hard deadline (00:00:00 EST of November 7th), whichever comes first.

After joining the contest, you proceed to the Problems tab to begin.

Here are the parameters of the contest:

  • Some problems offer partial marks in the form of subtasks.
  • Ties will be broken by the maximum submission time that increased score with no penalties.
  • A maximum of 50 submissions will be allowed per problem.
  • Scoreboard will be hidden, until your window is over. Divulging the contents of the scoreboard to participants who have not finished their window is an offense, the punishments of which are listed below.
  • Problems will be approximately increasing in difficulty, and will all have full feedback. Reading all of the statements is recommended.
  • Checkers: unless otherwise specified, standard.
  • Interactors: unless otherwise specified, assume that all interactors are not adaptive.
  • Rated for opening the contest. Being able to read the problems will cause the contest to be rated.
  • It is guaranteed that all the problems will be solvable with C++, and all time limits will be at least 2x the runtime of the reference solution.

We have listed below some advice as well as contest strategies:

  • Remove all extra debugging code and/or input prompts from your code before submitting. The judge is very strict — most of the time, it requires your output to match exactly.
  • Do not pause program execution at the end. The judging process is automated. You should use stdin / stdout to perform input / output, respectively.
  • Python users are recommended to use PyPy 2/3 over Python 2/3 when submitting.

Clarification requests for the contest must be routed through the clarification system provided on DMOJ, and not through other channels including but not limited to Discord and Slack. Furthermore, all clarification requests will be handled the way they normally are in IOI. Note that, in particular, clarification requests must come in the form of yes/no questions.

Due to rampant issues with cheating on contests that has happened recently, any suspicious behavior during the contest window may result in your rating being impacted negatively. Such behavior includes, but is not limited to:

  • Divulging the contents of the scoreboard to participants who have not finished their window.
  • Registering for the contest with at least two accounts.
  • Participating in the contest with an account that is not your primary account.
  • During the contest window, talking about the contest in more detail than answering a yes/no question about whether one participated in the contest. This includes, but is not limited to, posting spoilers about the contest and public speculation of the contest.
  • Attempting to exploit bugs in the platform to subvert the constraints of the contest.
  • Attacking the judge infrastructure, other contestants, or contest personnel within or after your window.

Punishments may include performance being unrated or, for more serious infractions, being forcibly ranked at the bottom of the scoreboard.

At the end of the contest, you may comment below to appeal a judging verdict. In the case of appeals, the decision(s) of DMOJ staff is final.


  • 1
    boomer9367  commented on Nov. 11, 2023, 12:37 a.m.


  • 11
    Zellindorz  commented on Nov. 7, 2023, 3:06 a.m.

    I went in believing and I came out with crushed hopes and dreams. Back to the grind.

  • 16
    jzhu19  commented on Nov. 5, 2023, 11:47 p.m.

    I know this might not mean much coming from a random, but I just wanted to say that I really enjoyed doing the problems in this contest (I haven't really had this much fun doing cp problems in a long time lol)! Thx for making the contest!!!

  • 2
    tkaldk  commented on Nov. 3, 2023, 6:13 a.m.

    is it only for c++?

    • 8
      BalintR  commented on Nov. 3, 2023, 6:47 p.m.

      You can submit in any language supported by the site. It is only guaranteed that all problems are solvable in C++ since problems are generally tested in C++. Other languages, like Python, may or may not be fast enough to allow you to solve all problems.

    • -2
      Viv_CCGS  commented on Nov. 3, 2023, 12:10 p.m.

      Python users are recommended to use PyPy 2/3 over Python 2/3 when submitting

      No, other languages, like Python, are supported in this contest.

  • -18
    volcano  commented on Nov. 2, 2023, 7:32 p.m.

    This comment is hidden due to too much negative feedback. Show it anyway.

  • 7
    Dec0Dedd  commented on Nov. 2, 2023, 7:17 p.m.


  • 7
    b_nary  commented on Nov. 2, 2023, 5:32 a.m.


  • 3
    ostrichthattypes  commented on Nov. 1, 2023, 11:53 p.m.


    • 4
      Meh494  commented on Nov. 2, 2023, 12:12 a.m.


  • 7
    Zellindorz  commented on Nov. 1, 2023, 3:52 p.m.