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Official problem statements for this contest (PDF): Problem 1. Stone Game — PDF Problem 2. Modern Art 3 — PDF Problem 3. Count the Cows — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 2. Comfortable Cows — PDF Problem 3. Clockwise Fence — PDF Problem1. Year of the cow — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Closest Cow Wins — PDF Problem 2. Connecting Two Barns — PDF Problem 3. Convoluted Intervals — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Tickets — PDF Problem 2. Paired Up — PDF Problem 3. HILO — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Paired Up — PDF Problem 2. HILO — PDF Problem 3. Bracelet Crossings — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Lonely Photo — PDF Problem 2. Air Cownditioning — PDF Problem 3. Walking Home — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Visits — PDF Problem 2. Subset Equality — PDF Problem 3. COW Operations — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. 262144 Revisited — PDF Problem 2. Hoof and Brain — PDF Problem 3. Up Down Subsequence — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Apple Catching — PDF Problem 2. Pair Programming — PDF Problem 3. Balancing a Tree — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.

Official problem statements for this contest (PDF): Problem 1. Photoshoot — PDF Problem 2. Counting Liars — PDF Problem 3. Alchemy — PDF New here? See how to practise with past contests, or browse the full official archive on usaco.org.