2021 USACO Platinum January Contest Problems Problem 1. Sum of Distances Problem 2. Minimum Cost Paths Problem 3. Paint by Letters
2021 USACO Gold January Contest Problems Problem 1. Uddered but not Herd Problem 2. Telephone Problem 3. Dance Mooves
2021 USACO Bronze January Contest Problems Problem 1. Uddered but not Herd Problem 2. Even More Odd Photos Problem 3. Just Stalling
2021 USACO Silver February Contest Problems Problem 1. Comfortable Cows Problem 2. Year of the Cow Problem 3. Just Green Enough
2021 USACO Platinum February Contest Problems Problem 1. No Time to Dry Problem 2. Minimizing Edges Problem 3. Counting Graphs
2021 USACO Gold February Contest Problems Problem 1. Stone Game Problem 2. Modern Art 3 Problem 3. Count the Cows
2021 USACO Bronze February Contest Problems Problem 2. Comfortable Cows Problem 3. Clockwise Fence Problem1. Year of the cow
2021 USACO Silver December Contest Problems Problem 1. Closest Cow Wins Problem 2. Connecting Two Barns Problem 3. Convoluted Intervals
2021 USACO Platinum December Contest Problems Problem 1. Tickets Problem 2. Paired Up Problem 3. HILO
2021 USACO Gold December Contest Problems Problem 1. Paired Up Problem 2. HILO Problem 3. Bracelet Crossings