Hi Codeforces! I'm excited to invite you to the Fall 2025 PHS Computing Olympiad, a programming contest run by the Poolesville High School computer team! The contest will take place on October 25th, 2025 at 5:00PM (UTC) and last for four hours.
Format & Difficulty
The contest will be hosted on Codeforces and last for 4 hours. There will be a Standard Division and an Advanced Division, roughly corresponding to Div4 and Div2 difficulty, respectively. Each division will contain $$$12$$$ to $$$15$$$ problems, and all problems are equally weighted with a time penalty of 20 minutes for wrong submission.
You can choose to register either as a solo participant or as a team of two.
This contest is aimed towards participants with $$$ \lt 2100$$$ rating, but anyone is welcome to participate!
Prizes
Prizes will be given to the top-performing high school teams in each division, as well as to the top-performing global participants in the Advanced Division.
- Standard Podium (HS or below): $40, $30, $20
- Advanced Podium (HS or below): $60, $40, $30
- Advanced Podium (All Participants): $25, $15, $10
If participating as a team of two, prize money will be evenly split between both members.
A big shoutout to the PHS Science, Math, and Computer Science program for sponsoring the prize pool for this year's PHSCO!
Registration
To register, please fill out this form and join the Codeforces group prior to the competition date!
For more information, visit our website at https://www.phsco.info.
UPD: Editorial & Winners
Reminder that the contest is in less than 24 hours! If you plan on participating, make sure to register by filling out the linked form AND joining the Codeforces group if you haven't already :D
thanks for the good contest, but I also got cooked
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