USACO 2020 US Open Contest, Platinum Problem 3. Circus The NN cows of Farmer John's Circus (1≤N≤1051≤N≤105) are preparing their upcoming acts. The acts all take place on a tree with vertices labele...
USACO 2020 US Open Contest, Platinum Problem 3. Circus The NN cows of Farmer John's Circus (1≤N≤1051≤N≤105) are preparing their upcoming acts. The acts all take place on a tree with vertices labele...
USACO 2020 US Open Contest, Platinum Problem 2. Exercise Farmer John has come up with a new morning exercise routine for the cows (again)! As before, Farmer John's NN cows (1≤N≤75001≤N≤7500) are st...
USACO 2020 US Open Contest, Platinum Problem 1. Sprinklers 2: Return of the Alfalfa Return to Problem List Farmer John has a small field in the shape of an NN by NN grid (1≤N≤20001≤N≤2000) where th...
USACO 2022 US Open Contest, Bronze Problem 3. Alchemy Always keen to learn new hobbies, Bessie the cow is learning how to transform metals. She has aiai (0≤ai≤1040≤ai≤104) units of metal ii for 1≤i...
USACO 2022 US Open Contest, Bronze Problem 2. Counting Liars Bessie the cow is hiding somewhere along the number line. Each of Farmer John's NN other cows (1≤N≤10001≤N≤1000) have a piece of informa...
USACO 2022 US Open Contest, Bronze Problem 1. Photoshoot Farmer John, desperate to win the award for best cow photographer at the county fair, is trying to take the perfect photograph of his NN cow...
USACO 2022 US Open Contest, Silver Problem 3. COW Operations Bessie finds a string ss of length at most 2⋅1052⋅105 containing only the three characters 'C', 'O', and 'W'. She wants to know if it's ...
USACO 2022 US Open Contest, Silver Problem 2. Subset Equality The cows are trying out a new method of exchanging coded messages with each-other where they mix irrelevant letters in among relevant l...
