USACO 2021 US Open, Silver Problem 2. 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 a simple...
USACO 2021 US Open, Silver Problem 1. Maze Tac Toe Bessie the cow enjoys solving mazes. She also enjoys playing tic-tac-toe (or rather, the cow version of tic-tac-toe, described shortly). Farmer Jo...
Final Results: USACO 2021 US Open, Gold Key: * = Correct x = Wrong Answer (including possibly empty or missing output file) t = Timeout c = Didn't Compile ! = Run-time error or exceeded memory limi...
USACO 2021 US Open, Gold Problem 3. Permutation Bessie has NN (3≤N≤403≤N≤40) favorite distinct points on a 2D grid, no three of which are collinear. For each 1≤i≤N1≤i≤N, the ii-th point is denoted ...
USACO 2021 US Open, Gold Problem 2. Portals Bessie is located in a network consisting of NN (2≤N≤1052≤N≤105) vertices labeled 1…N1…N and 2N2N portals labeled 1…2N1…2N. Each portal connects two dist...
USACO 2021 US Open, Gold Problem 1. United Cows of Farmer John The United Cows of Farmer John (UCFJ) are sending a delegation to the International bOvine olympIad (IOI). There are NN cows participa...
Final Results: USACO 2021 US Open, Platinum Key: * = Correct x = Wrong Answer (including possibly empty or missing output file) t = Timeout c = Didn't Compile ! = Run-time error or exceeded memory ...
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). ...
