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XCPC rules

  • 6 problems, 3 hours, teams of 2 or 3 with 3 computers.
  • It is mandatory to submit solutions in C++.
  • You can use Python for generating testcases, for example.
  • Please create an account on Kattis.

  • You have to use the computers provided in the lab.
    To get your AltGr key back, go to Settings > Keyboard > Alt/Compose > choose “Right Super” for example. To change layout, open a Terminal and do setxkbmap us or setxkbmap fr.

  • You have to use the provided KACTL notebook, that won’t be printed.
git clone https://github.com/kth-competitive-programming/kactl.git

It’s okay to copy-paste code from this repository only.
Template is in content/contest/template.cpp.

  • It’s okay to have a config file or macros but please show them to the coach.
  • You cannot use Google, LLMs or anything else besides the notebook. But you can browse cppreference.com.

Advice

  • Read the problem statements and check the constraints. Split the work with your team.
  • Think on paper. You are encouraged to write on the problem statements (e.g. highlight constraints).
  • Manage your time: solve the easy problem(s) as soon as possible.
  • Every minute counts, so don’t give up. If it’s hard, it’s hard for everybody.
  • Build some testcases yourself.

Common mistakes

  • Do not forget long long
  • Your code should have upper bounds that are high enough.
  • Do not forget to clear your structures between two consecutive testcases.