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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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2019 USACO Silver January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Grass Planting — PDF Problem 2. Icy Perimeter — PDF Problem 3. Mountain View — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Platinum January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Redistricting — PDF Problem 2. Exercise Route — PDF Problem 3. Train Tracking 2 — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Gold January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cow Poetry — PDF Problem 2. Sleepy Cow Sorting — PDF Problem 3. Shortcut — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Bronze January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Shell Game — PDF Problem 2. Sleepy Cow Sorting — PDF Problem 3. Guess the Animal — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Silver February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Sleepy Cow Herding — PDF Problem 2. Painting the Barn — PDF Problem 3. The Great Revegetation — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Platinum February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cow Dating — PDF Problem 2. Moorio Kart — PDF Problem 3. Mowing Mischief — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Gold February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cow Land — PDF Problem 2. Dishwashing — PDF Problem 3. Painting the Barn — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Bronze February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Sleepy Cow Herding — PDF Problem 2. The Great Revegetation — PDF Problem 3. Measuring Traffic — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Silver December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cow Gymnastics — PDF Problem 1. MooBuzz — PDF Problem 2. Meetings — PDF Problem 3. Milk Visits — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2019 USACO Platinum December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Greedy Pie Eaters — PDF Problem 2. Bessie's Snow Cow — PDF Problem 3. Tree Depth — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.