USACO 2020 US Open Contest, Gold Problem 2. Favorite Colors Each of Farmer John's NN cows (1≤N≤2⋅1051≤N≤2⋅105) has a favorite color. The cows are conveniently labeled 1…N1…N (as always), and each c...
USACO 2020 US Open Contest, Gold Problem 1. Haircut Tired of his stubborn cowlick, Farmer John decides to get a haircut. He has NN (1≤N≤1051≤N≤105) strands of hair arranged in a line, and strand ii...
Final Results: USACO 2020 US Open Contest, Platinum Key:* = Correctx = Wrong Answer (including possibly empty or missing output file)t = Timeoutc = Didn't Compile! = Run-time error or exceeded memo...
USACO 2020 US Open Contest, Platinum Problem 3. Circus The NN cows of Farmer John's Circus (1≤N≤1051≤N≤105) are preparing their upcoming acts. The acts all take place on a tree with vertices labele...
USACO 2020 US Open Contest, Platinum Problem 3. Circus The NN cows of Farmer John's Circus (1≤N≤1051≤N≤105) are preparing their upcoming acts. The acts all take place on a tree with vertices labele...
在近年的留学申请趋势中，标化成绩所占的比重正在逐渐减弱，课外活动、学术素养等软实力则越来越受到知名学府招生官们的重视。 作为课外活动的重头戏之一，科研项目已经成了留学之路上不可或缺的组成部分。参加国...
USACO 2020 US Open Contest, Platinum Problem 2. Exercise Farmer John has come up with a new morning exercise routine for the cows (again)! As before, Farmer John's NN cows (1≤N≤75001≤N≤7500) are st...
USACO 2020 US Open Contest, Platinum Problem 1. Sprinklers 2: Return of the Alfalfa Return to Problem List Farmer John has a small field in the shape of an NN by NN grid (1≤N≤20001≤N≤2000) where th...
全美青少年科学与人文大赛 Junior Science and Humanities Symposia (简称JSHS) Program 是一项由美国陆军、海军和空军三项赞助的 STEM 学术活动，旨在促进中学生对科学、技术、工程和数学的原创性研究和实验。每...
