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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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2020 USACO Gold January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Time is Mooney — PDF Problem 2. Farmer John Solves 3SUM — PDF Problem 3. Springboards — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Bronze January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Word Processor — PDF Problem 2. Photoshoot — PDF Problem 3. Race — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Silver February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Swapity Swapity Swap — PDF Problem 2. Triangles — PDF Problem 3. Clock Tree — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Platinum February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Delegation — PDF Problem 2. Equilateral Triangles — PDF Problem 3. Help Yourself — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Gold February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Timeline — PDF Problem 2. Help Yourself — PDF Problem 3. Delegation — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Bronze February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Triangles — PDF Problem 2. Mad Scientist — PDF Problem 3. Swapity Swap — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Silver December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cowntagion — PDF Problem 2. Rectangular Pasture — PDF Problem 3. Stuck in a Rut — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Platinum December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Sleeping Cows — PDF Problem 2. Spaceship — PDF Problem 3. Cowmistry — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Gold December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Replication — PDF Problem 2. Bovine Genetics — PDF Problem 3. Square Pasture — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2020 USACO Bronze December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Do You Know Your ABCs_ — PDF Problem 2. Daisy Chains — PDF Problem 3. Stuck in a Rut — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.