Queues and Priority Queues are data structures which are known to most computer scientists. The Queue occurs often in our daily life. There are many people lined up at the lunch time. Now w
题目 有两个问题,首先求1到 n n n的最大流(不解释了),然后求1到n使最大流扩展 k k k的费用,每扩展一个最大流,扩展一次边的费用 分析 当然如何做第二个问题,可以重新建一个汇点流量是最大流 + k +k +k,费用为0,并且原来的边再建一次从 u u u到 v v v,费用为该边的费用,流量无限跑一次最大流,then就讲完了 代码 #include <cstd
Thrall’s Dream Time Limit: 1000ms Memory limit: 65536K 有疑问?点这里^_^ 题目描述 We never paid any heed to the ancient prophecies, like fools we clung to the old hatreds, and fought as we had for