Mock CCC '21 Senior

Hello, welcome to a mock CCC! Here are the parameters of the contest:

  • Contest duration: 3 hours.
  • Number of problems: 5, full feedback. Each problem will be worth 15 marks.
  • Not rated.
  • Scoreboard will be hidden.
  • Contest format: IOI.
  • Number of submissions allowed per problem: 50.
  • Checkers for problems: Unless otherwise specified, identical. The contest will follow the standard convention of having all lines terminate in a \n character.
  • Testers for this contest: None.

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 Slack or Discord. 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.

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

The contest consists of 5 questions with a range of difficulty from CCC Senior 1 to CCC Senior 5. It is highly recommended to read all of the problems. You will have 3 hours to complete the contest. After the contest window begins, you may begin at any time. 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, whichever comes first.

After joining the contest, you proceed to the Problems tab to begin. You can also go to Users if you wish to see the rankings.

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

  • Start from the beginning.
  • Remove all extra debugging code and/or input prompts from your code before submitting. The judge is strict — your output must match the judge output exactly.
  • Do not pause program execution at the end. The judging process is automated. You should use stdin / stdout to perform input / output, respectively.
  • It is guaranteed that all the problems will be solvable with C++.

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

Problems

Problem Points AC Rate Users Editorials
Mock CCC '21 S1 - Edit Distance 5p 35.2% 350 Editorial
Mock CCC '21 S2 - Colorful Strings 7p 18.6% 228 Editorial
Mock CCC '21 S3 - Lexicographically Smallest Permutation Subsequence 10p 8.2% 81 Editorial
Mock CCC '21 S4 - Infinite Molecule 12p 8.1% 29 Editorial
Mock CCC '21 S5 - Clique and Independent Set 25p 17.2% 11 Editorial

Comments


  • 13
    JohnstonLiu  commented on Feb. 9, 2021, 2:19 a.m.

    I don't know how to read problems.


    • 5
      gary050613  commented on Feb. 9, 2021, 11:18 p.m.

      Yeah, lol these problem descriptions are questionable compared to the CCC ones.


    • 0
      Chrislojet  commented on Feb. 9, 2021, 8:29 p.m.

      Me too, kid.


  • 4
    Play_Erphil  commented on Feb. 3, 2021, 3:42 a.m. ← edited

    So, we have to wait until the contest is done to start upsolving right? Nevermind, if I spectate I can submit