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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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2022 USACO Gold December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Bribing Friends — PDF Problem 2. Mountains — PDF Problem 3. Strongest Friendship Group — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.
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2022 USACO Bronze December Contest Problems
Official problem statements for this contest (PDF): Problem 1. Cow College — PDF Problem 2. Feeding the Cows — PDF Problem 3. Reverse Engineering — 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 February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Bakery — PDF Problem 2. Cow-libi — PDF Problem 3. Moo Route II — 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 February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Hungry Cow — PDF Problem 2. Problem Setting — PDF Problem 3. Watching Cowflix — 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 February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Equal Sum Subarrays — PDF Problem 2. Fertilizing Pastures — PDF Problem 3. Piling Papers — 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 February Contest Problems
Official problem statements for this contest (PDF): Problem 1. Hungry Cow — PDF Problem 2. Stamp Grid — PDF Problem 3. Watching Mooloo — 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 January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Find and Replace — PDF Problem 2. Following Directions — PDF Problem 3. Moo Route — 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 January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Tractor Paths — PDF Problem 2. Mana Collection — PDF Problem 3. Subtree Activation — 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 January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Find and Replace — PDF Problem 2. Lights Off — PDF Problem 3. Moo Route — 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 January Contest Problems
Official problem statements for this contest (PDF): Problem 1. Leaders — PDF Problem 2. Air Cownditioning II — PDF Problem 3. Moo Operations — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.