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USACO 2021 US Open, Platinum Problem 2. Routing Schemes Consider a network of NN (2≤N≤1002≤N≤100) nodes labeled 1…N1…N. Each node is designated as a sender, a receiver, or neither. The number of se...
USACO 2021 February Contest, Platinum Problem 2. Minimizing Edges Bessie has a connected, undirected graph GG with NN vertices labeled 1…N1…N and MM edges (2≤N≤105,N−1≤M≤N2+N22≤N≤105,N−1≤M≤N2+N2). ...
USACO 2021 US Open, Platinum Problem 1. United Cows of Farmer John Return to Problem List The United Cows of Farmer John (UCFJ) are sending a delegation to the International bOvine olympIad ...
USACO 2021 February Contest, Bronze Problem 3. Clockwise Fence The fence surrounding Farmer John's largest pasture has fallen into disrepair, and he has finally decided to replace it with a new fen...
USACO 2021 February Contest, Bronze Problem 2. Comfortable Cows Farmer John's pasture can be regarded as a large 2D grid of square "cells" (picture a huge chessboard). Initially, the pasture is emp...
USACO 2021 February Contest, Bronze Problem 1. Year of the Cow Farmer John's cows are excited to learn that Chinese New Year was recently celebrated, ushering in the year of the Ox, always a bovine...
USACO 2021 February Contest, Silver Problem 3. Just Green Enough Farmer John's pasture can be regarded as an N×NN×N grid (1≤N≤5001≤N≤500) of square "cells" of grass (picture a huge chessboard). Due...
USACO 2021 February Contest, Silver Problem 2. Year of the Cow Farmer John's cows are excited to learn that Chinese New Year was recently celebrated, ushering in the year of the Ox, always a bovine...
USACO 2021 February Contest, Silver Problem 1. Comfortable Cows Farmer Nhoj's pasture can be regarded as a large 2D grid of square "cells" (picture a huge chessboard). Initially, the pasture is emp...
