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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)](https://www.timeanddate.com/worldclock/fixedtime.html?msg=PHS+Computing+Olympiad+Fall+2025&iso=20251025T17&p1=1440&ah=4) and last for four hours.↵
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### Format & Difficulty↵
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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.↵
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You can choose to register either as a solo participant or as a team of two.↵
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This contest is aimed towards participants with $< 2100$ rating, but anyone is welcome to participate!↵
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### Prizes↵
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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.↵
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- Standard Podium (HS or below): $40, $30, $20↵
- Advanced Podium (HS or below): $60, $40, $30↵
- Advanced Podium (All Participants): $25, $15, $10↵
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If participating as a team of two, prize money will be evenly split between both members.↵
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A big shoutout to the PHS Science, Math, and Computer Science program for sponsoring the prize pool for this year's PHSCO!↵
↵
### Registration↵
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To register, please fill out [this form](https://forms.gle/2nfa1i9Kz2vobNtr7) and join the [Codeforces group](https://mirror.codeforces.com/group/ZziSOJM5rq/contests) prior to the competition date!↵
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For more information, visit our website at [https://www.phsco.info](https://www.phsco.info/).↵
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**UPD:** [Editorial & Winners](https://mirror.codeforces.com/blog/entry/147831)↵
↵
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)](https://www.timeanddate.com/worldclock/fixedtime.html?msg=PHS+Computing+Olympiad+Fall+2025&iso=20251025T17&p1=1440&ah=4) 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 $< 2100$ 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](https://forms.gle/2nfa1i9Kz2vobNtr7) and join the [Codeforces group](https://mirror.codeforces.com/group/ZziSOJM5rq/contests) prior to the competition date!↵
↵
For more information, visit our website at [https://www.phsco.info](https://www.phsco.info/).↵
↵
**UPD:** [Editorial & Winners](https://mirror.codeforces.com/blog/entry/147831)↵
