Schedule for COSCON.

COSCON will be held on Sunday, November 16th, 2025. The location of all COSCON events is the Friend Center. All times below are in EST.

• 9:30 AM arrival and check-in
• 10:00 AM opening ceremony
• after above problems released
• ~12:30 PM free pizza!
• 4:00 PM contest ends
• 4:30 PM closing ceremony

The problems will be released at the end of the opening ceremony (around 10:30 to 11:00). Answers are submitted online, so you may do the problems from anywhere, but feel free to stick around the Friend Center all day long, chatting with other participants and organizers!

Problems.

The problems will be released at 11:00 AM. You will have 5 hours to work on this problem.
In terms of contest rules, please check out the list of contest rules in detail here. The high level summary is that with the only restriction being that you cannot consult anyone outside of your team live (either in person or online). Besides this restriction, feel free to use any online/offline resources to your benefit.

The competition problems will be released here: Go to Problems

About COSCON.

COSCON is an annual computer science competition held at Princeton University by the Princeton ACM student chapter. The organizers and problem writers this year are:

• Princeton ACM

Our faculty sponsor is Pedro Paredes.