USACO Guide
A free collection of curated, high-quality resources to take you from Bronze to Platinum and beyond.
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About This Guide
Not Just Another Resource.
This is more than "just another resource." This is a comprehensive, organized roadmap carefully designed and crafted for USACO contestants – available to everyone, for free.
This guide is not an official syllabus. Topics on this guide reflect past problems, not future problems.
Experienced Authors
This guide is written by top USACO contestants, including two-time IOI winner and USACO Problemsetter Benjamin Qi.
Calibrated Difficulty
This guide is targeted towards all contestants, regardless of their division. You'll find problems suitable for you.
Improve Faster
Stop wasting time learning topics you already know. Skip over easy topics or delve deeper into difficult ones; the choice is yours.
Stay Motivated
Use our progress-tracking tools to track your progress in the Guide and stay motivated.
Unsure how to get started?
Overwhelmed by too many resources?
Looking to take your CP skills to the next level?
This is the guide for you.
Frequently asked questions
- What is the USACO?
USACO stands for the USA Computing Olympiad. Check out the USACO FAQ Page for more information.
- Is this an official syllabus?
No, USACO does not have an official syllabus. This guide merely lists topics that have historically appeared in USACO contests; it makes no guarantees about the topics in future USACO contests.
- How do I report a problem or ask a question?
If you encounter an issue while using the guide (website bug, typo, broken link, unclear explanation, etc), use the "Contact Us" button. Alternatively, email us at usacoguide@gmail.com.
- I'm looking for classes, club curriculum...
Check out the Competitive Programming Initiative!
- Is this guide for non-USACO competitive programmers?
Of course! While we structure our content around USACO, feel free to use this guide even if you don't do USACO. You will still learn a lot from it!
- How can I get help?
If you get stuck, head over to the USACO Forum for help.
- How can I contribute?
To learn more about contributing, please visit this page. We appreciate any and all contributions!
- Is this open source?
Yes! Check out our Github Repository.
Authors you can trust.
Nathan Wang is a three-time USACO Finalist and web development enthusiast.
Benjamin Qi is a two-time IOI winner, USACO Problemsetter, and part of the MIT Class of 2023.
Michael Cao is a USACO Platinum competitor and USACO problemsetter.
Darren Yao is a USACO Platinum competitor and author of the textbook "An Introduction to USACO."
Nathan Chen is a two-time USACO Finalist who competes in both Java and C++ fluently.
Andrew Wang is a USACO Platinum competitor and a researcher in the field of bioinformatics.
Bing-Dong Liu is a USACO Platinum competitor who creates video editorials for USACO Training problems.
Maggie Liu is a USACO competitor who enjoys problem solving and teaching others programming and math.
Contributors
By the Community, for the Community.
Interested in joining the USACO Guide team? We are recruiting Content Authors to help us improve the USACO Guide! Apply here. If you're in the United States, you can earn volunteer hours too!
Current Content Authors:
- Jeffrey Meng (since Oct 2020)
- Neo Wang (since Jan 2021)
- Jesse Choe (since Feb 2021)
- Kevin Sheng (since Apr 2021)
- Ananth Kashyap (since Apr 2021)
- Sofia Yang (since Apr 2021)
- Nathan Gong (since Apr 2021)
- Melody Yu (since Apr 2021)
- Timothy Gao (since May 2021)
- Brad Ma (since June 2021)
- Albert Ye (since June 2021)
- Arpan Banerjee (since June 2021)
- Ryan Chou (since July 2021)
- This could be you! Apply here.
Past Content Authors:
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