The California Informatics Competition is a high-school programming competition hosted by students at UC Berkeley. We create contest problems to promote the understanding of useful algorithms and encourage students to grow their problem-solving skills! To see some past problems, check out our Problem Bank.

What Do We Do?


Our biannual programming competition is for students up to 12th grade. These contests are run during the fall and spring season, and consist of a large number of problems meant to be solved by teams. Come prepared to bring your best, and we will take care of the rest!


Our CALSUCO summer contests are open to participants of all ages! Compete as an individual; these contests consist of multiple online, bite-sized rounds run during the summer months. Keep your skills fresh with these lower-stakes, casual contests!

Editor's Choice

These problems almost made the cut for our competitions--so close! These contests are released on our problem bank before CALICO competitions; no registration necessary! Same format, same rules--feel free to use these as practice material, tryouts for teams, or to test your computer setup!

Congratulations to the top contestants of

Chongtian Ma, StuyCCC
Eric Xue
Eric Xue
Daniel Qiu
Aleksandar A. Yanev, High School Of Mathematics "D-r Petar Beron"
Vraj Patel
Vraj Patel
6 hi
George Pong
7 MeepMurp5
Vincent Wang
8 solarlego
Casey Dow, Campolindo
Dorothy Zheng
10 lchi123
Leonardo T. Chi, STEMnARTS


7/30: Confirmation emails have been sent to all registered attendees! Keep an eye out for another email that will contain your autograder credentials.


Date Time (PT) Event
7/28/2022 11:59PM Registration Deadline
7/29/2022 6:00PM Contest Page Published
8:00PM Confirmation Emails Sent
7/30/2022 1:00PM Contest Begins!
3:00PM Contest Ends
TBD TBD Winners Announced!

Contest Schedule

Date Contest Registration Deadline
7/30/2022 CALSUCO '22 7/27/2022 11:59PM PST
TBA Editor's Choice Fall '22 No Deadline!
TBA CALICO Fall '22 Online To Be Announced

Want to be the first to know when registrations open? Sign up for our email list to get updates sent right to your inbox!


In short, anybody can participate! In longer terms, CALSUCO is open to all participants, regardless of age or schooling status!

Once you've registered, you can expect an email from us after the registration deadline about how to access the contest site. For more information on this, see "Contest Autograder Logistics" under our Contest Guide.

In the meantime, check out our "Preparing for the Contest" checklist, also found on our Contest Guide!

CALSUCO contests are meant to be more experimental than their spring and fall counterparts--they'll introduce new mechanics and ideas that you can expect to see soon at regular CALICO contests.

However, if you know how to work with conditions, loops, strings, and integers, you can start solving problems! At a higher level, our problems give students a preview into concepts taught at various classes within Berkeley's CS department. Regardless of whether you're just starting out or a seasoned programmer, there will be something for you!

All you need is a computer running an approved programming language, a text editor to work with, and a stable internet connection! For a list of approved programming languages, see "Approved Languages" under our Contest Guide.

Due to the smaller nature of the contest, participants will compete on an individual level.

The following prizes will be awarded to the highest-scoring individuals:

  • 1st Place: $50 Amazon Gift Card
  • 2nd Place: $30 Amazon Gift Card
  • 3rd Place: $20 Amazon Gift Card
  • 4th - 10th Place: $15 Amazon Gift Card

Amazon Gift Cards will be emailed to the winning individuals following the contest.

Check out our Contest Guide to learn about the rules, the structure of the contest, and other technical details!

If you have a question, don't hesitate to email us at team@calico.berkeley.edu! Feel free to also reach out to us on Instagram.

Join Our Email List!

Stay in the loop for CALICO announcements by signing up for email notifications! Our email list will only notify you when contest registrations open, along with other important updates.

Visit Our Problem Bank!

Past contest problems, along with their full test cases and solutions, can be accessed here! We highly encourage you take a look. Practice problems will also be published here occasionally, so check back here every once in a while!


Thank you to these organizations for making our events possible! Interested in supporting CALICO? Shoot us an email at team@calico.berkeley.edu!