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Contest news.
Clear context.
Updates, explainers and preparation notes for the USA Computing Olympiad — organized for students and families who want the important signal without the noise.
Latest dispatches
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2023 USACO Silver US Open Contest Problems
Official problem statements for this contest (PDF): Problem 1. Milk Sum — PDF Problem 2. Field Day — PDF Problem 3. Pareidolia — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Platinum US Open Contest Problems
Official problem statements for this contest (PDF): Problem 1. Pareidolia — PDF Problem 2. Good Bitstrings — PDF Problem 3. Triples of Cows — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Gold US Open Contest Problems
Official problem statements for this contest (PDF): Problem 1. Custodial Cleanup — PDF Problem 2. Pareidolia — PDF Problem 3. Tree Merging — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Bronze US Open Contest Problems
Official problem statements for this contest (PDF): Problem 1. FEB — PDF Problem 2. Moo Language — PDF Problem 3. Rotate and Shift — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Silver December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Bovine Acrobatics — PDF Problem 2. Cycle Correspondence — PDF Problem 3. Target Practice — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Platinum December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cowntact Tracing — PDF Problem 2. A Graph Problem — PDF Problem 3. Train Scheduling — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Gold December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Flight Routes — PDF Problem 2. Minimum Longest Trip — PDF Problem 3. Haybale Distribution — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2023 USACO Bronze December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Candy Cane Feast — PDF Problem 2. Cowntact Tracing 2 — PDF Problem 3. Farmer John Actually Farms — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2024 USACO Silver February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Target Practice II — PDF Problem 2. Test Tubes — PDF Problem 3. Moorbles — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2024 USACO Platinum February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Lazy Cow — PDF Problem 2. Minimum Sum of Maximums — PDF Problem 3. Infinite Adventure — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.