USACO 2021 January Contest, Gold Problem 2. Telephone Farmer John's NN cows, conveniently numbered 1…N1…N, are standing in a line (1≤N≤5⋅1041≤N≤5⋅104). The iith cow has a breed identifier bibi in t...
USACO 2021 January Contest, Gold Problem 1. Uddered but not Herd A little known fact about cows is that they have their own version of the alphabet, the "cowphabet". It consists of the 26 letters '...
Final Results: USACO 2021 January Contest, Platinum Key: * = Correct x = Wrong Answer (including possibly empty or missing output file) t = Timeout c = Didn't Compile ! = Run-time error or exceeded...
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...
