摘要： Farmer John has N hills on his farm (1 <= N <= 1,000), each with an integer elevation in the range 0 .. 100. In the winter, since there is abundant sn 阅读全文

摘要： Farmer John's hobby of conducting high-energy physics experiments on weekends has backfired, causing N wormholes (2 <= N <= 12, N even) to materialize 阅读全文

摘要： 二分匹配传送门[here] 原题传送门[here] 题意大概说一下，就是有N头牛和M个牛棚，每头牛愿意住在一些牛棚，求最大能够满足多少头牛的要求。 很明显就是一道裸裸的二分图最大匹配，但是为了练练网络流（做其它的题的时候，神奇地re掉了，于是就写基础题了）的最大流算法，就做做这道题。 每一个牛都可一 阅读全文