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USACO 2018 December Contest, Platinum Problem 1. Balance Beam
In order to save money for a new stall in her barn, Bessie the cow has started performing in the local circus, demonstrating her remarkable sense of balance as she carefully walks back and forth on...
USACO 2018 December Contest Platinum Problem 2 Sort It Out
FJ has NN (1≤N≤1051≤N≤105) cows (distinctly identified 1…N1…N) lined up in a row. FJ likes his cows to be sorted in increasing order, but unfortunately they are currently out of order. While in the...
USACO 2018 December Contest Platinum Problem 3 The Cow Gathering
Cows have assembled from around the world for a massive gathering. There are NN cows, and N−1N−1 pairs of cows who are friends with each other. Every cow knows every other cow through some chain of...
USACO 2018 December Contest Gold Problem2 COWPATIBILITY
It turns out there is one factor that matters far more than any other when determining whether two cows are compatible as potential friends: whether they like similar flavors of ice cream! Farmer J...
USACO 2018 December Contest Gold Problem3 Teamwork
For his favorite holiday, Farmer John wants to send presents to his friends. Since he isn't very good at wrapping presents, he wants to enlist the help of his cows. As you might expect, cows are no...
USACO 2018 December Contest Gold Problem1 FINE DINING
扫码免费领取学术活动真题及最新消息，获取报名表，咨询最新报名通道 The cows are heading back to the barn at the end of a long day, feeling both tired and hungry. The farm consists of pastures ( ), co...
USACO 2018 December Contest Silver 3 MOOYO MOOYO
With plenty of free time on their hands (or rather, hooves), the cows on Farmer John's farm often pass the time by playing video games. One of their favorites is based on a popular human video game...
USACO 2018 December Contest Silver 2 Convention II
Despite long delays in airport pickups, Farmer John's convention for cows interested in eating grass has been going well so far. It has attracted cows from all over the world. The main event of the...
