1. XCPC
   1. Schedule
   2. XCPC rules & environment
   3. Registered Teams
   4. Advice

XCPC

XCPC is a local ICPC selection contest at École Polytechnique. Top 2 to 3 teams (with probability 1) from the contest will advance to SWERC to represent the school.

Schedule

XCPC 2026 will happen on November 7 in computer rooms of X, from 1 PM to 6 PM.

12:40 – 12:50

entering computer rooms

13:00 – 18:00

contest

18:00 – 18:30

problem analysis and results announcement

1 hour before the contest ends, the scoreboard will be frozen. It will be unfrozen during results announcement.

XCPC rules & environment

We are following the regulations of SWERC. Main points and technical details are outlined below.

• Teams of up to 3 participants with one computer per team. All the teams will use computers of Polytechnique. Bringing your own computer or keyboard is forbidden. We can provide AZERTY keyboard on demand.
• Teams will be ranked according to the number of problems solved. We will break ties according to time penalty, that is, the sum of minute timestamps for solved problems, with a penalty of 20 min per failed attempt, only taken into account for solved problems.
• It is forbidden to use any electronic devices except your team’s computer, including phones, watches, AR glasses, etc.
• It is forbidden to access any online resources except the judging system and authorized offline documentation.
• It is forbidden to use search engines or any AI models.
• It is forbidden to bring any written notes. Blank paper and writing tools are authorized.
• Teams are allowed to access and consult an offline version of cppreference.com and the team reference document.

Team reference document

This part of regulations significantly differs from SWERC.

Teams are allowed to use the provided KACTL reference document. It will not be printed and will be available in the testing system in pdf format. Teams are authorized to consult this document and copy its content.

Programming languages

The following programming languages will be present in the judging system:

All problems are guaranteed to have solutions in C++. There is no such guarantee for other programming languages.

Printing

We will try to provide a possibility of printing your solutions and other text files during the contest. However, we cannot guarantee its availability during the contest.

Registered Teams

In order to participate, your team must be registered.
If you have attended PDV/MODAL course this year and you have a team, then you are registered.
If you have filled out the Google Form for XCPC/XCAIC registration or contacted Jill-Jênn Vie about it, then you are registered.
If you wish to register your team, contact jill-jenn.vie@inria.fr or manoprenko@gmail.com.

École polytechnique (20)

• “ACE” (ESL, CP, AM)
• Alliance of the Golden Witch (QNB, VR, GBD)
• “AVL” (AT, VB, LBM)
• Bambiliches (DC, LC, AB)
• BeurreVolant (PF, EA, AP)
• Cache me if you can (NK, RS, AB)
• “ERL” (LMI, EM, RAP)
• FBZ (TO, MC, AC)
• five hand team (AH, SCNY, AS)
• ICPC Dream Team (XBH, MK, AP)
• Moo’s Algorithm (LC, MS, DG)
• nonameteam (HG, AEO, MM)
• PC 34 (BM, AM, GT)
• Skill_Issue_Error (TA, JC, AdB)
• Team Alpha (YB, IP, LS)
• Triangle Inequality (RT, KV, WB)
• Untitled Team 3 (PL, PA, AT)
• Untitled Team 5 (MKK, TM, TM)
• Untitled Team 6 (SA, AK, EI)
• Zarbout (YM, EO, MG)

Polytech Paris-Saclay (1)

• polyteam (MD, MD, GR)

ENS Paris (17)

• TBC

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.