A free collection of curated, high-quality resources
to take you from Bronze to Platinum and beyond.
Stop wasting time searching for problems and tutorials. The USACO Guide provides a comprehensive, organized roadmap carefully designed and crafted for USACO contestants – available to everyone, for free.
|video explanation + problems for DSU|
Disjoint Data Sets
|both optimizations, diagrams|
11.1 - Disjoint Sets
|both optimizations, no diagrams|
15.2 - Union-Find
|small to large, diagrams|
Learn new topics from a vetted list of high-quality resources. If one resource doesn't click, look at another!
Closing the Farm
2016 - Park
Practice each topic with extensive problemsets and solutions covering a wide range of difficulties.
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This guide is written by top USACO contestants, including two-time IOI winner and USACO Problemsetter Benjamin Qi.
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USACO stands for the USA Computing Olympiad. Check out the USACO FAQ Page for more information.
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.
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