Bessie and Elsie were playing a game on a boolean array AA of length 2N2N (1≤N≤1051≤N≤105). Bessie's score was the number of inversions in the first half of AA, and Elsie's score was the number of ...
Farmer John wants to divide his NN cows (N≤7500)(N≤7500), conveniently numbered 1…N1…N, into KK non-empty groups (2≤K≤N2≤K≤N) such that no two cows from two different groups can interact with each ...
According to legend, St. Patrick banished all of the snakes in Mooland over a thousand years ago. However, snakes have since made their way back to Mooland! St. Patrick’s day was on March 17, so Be...
整理自USACO官网，名单较长，建议使用页面内查找（Ctrl+F）快速定位 Final Results: USACO 2019 US Open Contest, Gold Key: * = Correct x = Wrong Answer (including possibly empty or missing output file) t...
Bessie and friends have been captured and are trapped in a secret compound in a location far from their farm, and it is up to Bessie to plan their escape! The compound consists of NKNK holding cell...
Farmer John is planning to build NN (1≤N≤1051≤N≤105) farms that will be connected by N−1N−1 roads, forming a tree. Typically, whenever one of his farms is having an issue he is not told the specifi...
整理自USACO官网，名单较长，建议使用页面内查找（Ctrl+F）快速定位 Final Results: USACO 2019 US Open Contest, Silver Key: * = Correct x = Wrong Answer (including possibly empty or missing output file)...
Farmer John's NN cows, conveniently numbered 1…N1…N (2≤N≤1052≤N≤105), have a complex social structure revolving around "moo networks" --- smaller groups of cows that communicate within their group ...
In the past, Farmer John had contemplated a number of innovative ideas for new cow sports, among them Cow Steeplechase, where herds of cows would race around a course and jump over hurdles. His pas...
