ProCo Information

Team Registration

Due to the online nature of the contest, Stanford requires a maximum of 300 participants. Thus, slots to participate are awarded on a first come first serve basis. Once you submit your registration form, we will send out a confirmation email saying if you were accepted or not to participate.

Teams can have between one and three students. Students on a team do not need to be in the same grade, or have the same level of programming experience.

If we reach our participation cap, any remaining teams will be placed on a wait list, and they will be notified as soon as possible if spots become available. Once you submit your registration form, you will not be allowed to replace team members, only drop them if they are unable to attend.

We will finalize the roster exactly one week before the contest on May 8, 2021.


There are two different divisions in the competition: Novice and Advanced. A team may compete in the Novice division only if all members have less than two years of programming experience. If a team member has competed in ProCo or some equivalent contest before, they should compete in the Advanced division. Teams with participants who are at the Silver or higher level of USACO, should compete in the Advanced division.

If eligible for either division, teams may choose compete in the Advanced division. One incentive for doing so, is better prizes.

The ProCo staff has the right to disqualify any team that does not follow these rules of division assignment. If you are unsure what division to compete in, please reach out to the ProCo staff at

Laptops and Equipment

Each team member will be responsible for using their own computer and WiFi to compete in the contest. Communication among team members can be facilitated in any fashion.


Cool prizes will be awarded to the highest-scoring teams and vary year to year. Previous first place prizes have included Raspberry Pis, iPad Minis and Nintendo 3DSes. This year, our prizes are sponsored by Citadel Securities, and X-Camp Academy.


Access and Communication

Input and Output


Contest Format

ProCo will consist of 9 - 15 unweighted problems and will last for 3 hours.

Submissions will be run on a set of test cases which are not revealed to the teams during the contest, and they are accepted as correct if they pass on all of the test cases. Teams will be notified whether their submission is correct within about a minute. If the submission is correct, no further points can be awarded for the problem. If the submission is not accepted, teams are free to resubmit the problem. There is no limit on the number of submissions per problem.

The submissions from a team do not all need to be in the same language. For example, the same team could solve novA in C, novD in Java, and novF in C++.

Contest Platform

This year, ProCo will be using Codeforces to host the contest. Unlike last year, some preparation will be required from participants. Participants must create a Codeforces account before filling out the registration form, and include their username in the form.

They will also have to create their team on Codeforces, and report their team ID upon check-in the day of the contest. Stay tuned for more instructions on how to do this. After registration closes, ProCo staff members will also be able to help students do this on the day of the contest. Furthermore, we will host office hours to help students with doing this ahead of time.


Teams are ranked according to the most problems solved. Teams who solve the same number of problems will be ranked in accordance with ICPC style penalty points. The team with the lowest number of penalty points wins the tiebreaker. The rules for assigning penalty points are below:


Below is the tentative schedule of events for May 15th. All times are in PT

Event Time
Registration/Check-in 9:00 AM - 10:00 AM
Opening Assembly 10:00 AM - 10:45 AM
Practice Contest 10:45 AM -11:15 AM
Contest 12:00 PM - 3:00 PM
Sponsor Workshop 3:15 PM - 4:00 PM
Awards/Solutions 4:00 PM - 5:30 PM

Past Contests

Past contest results and problems can be found here.

External Resources

In order to prepare for ProCo, you may want to familiarize yourself with problems from similar contests. At the following sites you can find repositories of problems of varying styles and difficulty. Most of these problems are for training purposes and will be harder than the problems given. Recommended links (similar format or similar difficulty level) are listed first.