Destination Time
APR MONTH
12 DATE
2025 YEAR
09 HOUR
00 MINUTE
Time Left
DAYS
HOURS
MINUTES
SECONDS

Welcome to the Helvetic Coding Contest

The Helvetic Coding Contest, known as HC², is the biggest programming contest in Switzerland. Held over one day on the EPFL campus, it gathers over 200 participants ready to code at 88 miles per hour. After four years lost in the time vortex, the Polympiads association successfully brought back the event last year. Now, we're cranking up the flux capacitor and bringing HC² back on Saturday, April 12th, 2025, with even more prizes, problems, and participation! Don’t be late—this is one event you won’t want to rewrite history on!

Registration

Registration for HC² is now officially open ! Click here to register.

The registration fee is 10 CHF which includes goodies and lunch (to be paid via bank transfer, details available on registration form).

Details

Competition format

Teams of up to 3 participants will work on challenging problems together.

Eligibility

Every person, irrespective of age, gender, nationality, or any other factor, is welcome to participate.

Programming languages & tools

C++17, Java 11, Python 2.7 and Python 3.7.
You will be able to code using Emacs, Geany, Vim, Code::Blocks, Visual Studio Code, Atom, Kate, Eclipse, and GDB.

Resources

Previous HC² competition problems: 2019 , 2024
ACPC, ICPC style competition problems

Schedule

Sponsors

Academic partners

Last Year's Event

Check out some of the most exciting moments from last year’s HC² competition!

FAQ

What if I don't have a team?

Don’t worry! Register as a single participant, and we’ll try to find you a team.

You can always participate alone, of course.

What about food?

We will provide food for:

Morning: Breakfast buffet (croissants, chocolate, fruit juice, etc.) (included)

Lunch: Sandwiches, non-alcoholic drinks (included)

Evening: Pizza (Additionnal 12CHF)