USACO 2021 January Contest, Platinum Problem 3. Paint by Letters Bessie has recently received a painting set. The canvas can be represented as an N×MN×M rectangle of cells where the rows are labele...
USACO 2021 January Contest, Platinum Problem 2. Minimum Cost Paths Farmer John's pasture can be regarded as an N×MN×M (2≤N≤1092≤N≤109, 2≤M≤2⋅1052≤M≤2⋅105) 2D grid of square "cells" (picture a huge ...
USACO 2021 January Contest, Platinum Problem 1. Sum of Distances Bessie has a collection of connected, undirected graphs G1,G2,…,GKG1,G2,…,GK (2≤K≤5⋅1042≤K≤5⋅104). For each 1≤i≤K1≤i≤K, GiGi has exa...
USACO 2020 December Contest, Bronze Problem 3. Stuck in a Rut Farmer John has recently expanded the size of his farm, so from the perspective of his cows it is effectively now infinite in size! The...
USACO 2020 December Contest, Bronze Problem 2. Daisy Chains Every day, as part of her walk around the farm, Bessie the cow visits her favorite pasture, which has NN flowers (all colorful daisies) l...
USACO 2020 December Contest, Bronze Problem 1. Do You Know Your ABCs? Farmer John's cows have been holding a daily online gathering on the "mooZ" video meeting platform. For fun, they have invented...
USACO 2020 December Contest, Silver Problem 3. Stuck in a Rut Farmer John has recently expanded the size of his farm, so from the perspective of his cows it is effectively now infinite in size! The...
USACO 2020 December Contest, Silver Problem 2. Rectangular Pasture Farmer John's largest pasture can be regarded as a large 2D grid of square "cells" (picture a huge chess board). Currently, there ...
USACO 2020 December Contest, Silver Problem 1. Cowntagion Farmer John and his fellow farmers have been working nonstop to control the spread of the terrible bovine disease COWVID-19 across their fa...
