HBC24949[网络流24题]最小路径覆盖问题[USACO 2008 Jan S]Running题解

淫家是湿人 算法基础篇 54 0
挑战自我,勇攀编程高峰!全网最全C++题库,助您成为编程达人。
The cows are trying to become better athletes, so Bessie is running on a track for exactly N minutes. During each minute, she can choose to either run or rest for the whole minute.The ultimate distance Bessie runs, though, depends on her 'exhaustion factor', which starts at 0. When she chooses to run in minute i, she will run exactly a distance of Di and her exhaustion factor will increase by 1 -- but must never be allowed to exceed M . If she chooses to rest, her exhaustion factor will decrease by 1 for each minute she rests. She cannot commence running again until her exhaustion factor reaches 0. At that point, she can choose to run or rest.At the end of the N minute workout, Bessie's exaustion factor must be exactly 0, or she will not have enough energy left for the rest of the day.

The cows are trying to become better athletes, so Bessie is running on a track for exactly N (1 ≤ N ≤ 10,000) minutes. During each minute, she can choose to either run or rest for the whole minute. The ultimate distance Bessie runs, though, depends on her 'exhaustion factor', which starts at 0. When she chooses to run in minute i, she will run exactly a distance of Di (1 ≤ Di ≤ 1,000) and her exhaustion factor will increase by 1 -- but must never be allowed to exceed M (1 ≤ M ≤ 500). If she chooses to rest, her exhaustion factor will decrease by 1 for each minute she rests. She cannot commence running again until her exhaustion factor reaches 0. At that point, she can choose to run or rest. At the end of the N minute workout, Bessie's exaustion factor must be exactly 0, or she will not have enough energy left for the rest of the day. Find the maximal distance Bessie can run.

HBC24949[网络流24题]最小路径覆盖问题[USACO 2008 Jan S]Running题解
-第1张图片-东莞河马信息技术
(图片来源网络,侵删)

标签: HBC24949[网络流24题]最小路径覆盖问题[USACO 2008 Jan S]Running题解