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洛谷 P2986 [USACO10MAR]伟大的奶牛聚集(树形动规)
题目描述 Bessie is planning the annual Great Cow Gathering for cows all across the country and, of course, she would like to choose the most convenient lo ...
分类:其他好文   时间:2017-11-11 21:32:56    阅读次数:187
HDU3045 Picnic Cows (斜率DP优化)(数形结合)
转自PomeCat: “DP的斜率优化——对不必要的状态量进行抛弃,对不优的状态量进行搁置,使得在常数时间内找到最优解成为可能。斜率优化依靠的是数形结合的思想,通过将每个阶段和状态的答案反映在坐标系上寻找解答的单调性,来在一个单调的答案(下标)队列中O(1)得到最优解。” https://wenku ...
分类:其他好文   时间:2017-11-11 11:40:29    阅读次数:165
挑战程序设计3.5第3题 Dining
题意:一个农场主有N头牛,现在要给牛喂吃的,喝的。但是没头牛都有它自己喜欢的食物 和饮料。求最多能满足多少头牛的需求。(即:按照牛的意愿分配食物) 思路:这个题一看就是匹配问题(即:把食物和饮料与牛匹配起来),但这是1对2的匹配,所以肯定 没法用二分图匹配算法来解题。但图的匹配问题可以用最大流来实现 ...
分类:其他好文   时间:2017-11-08 20:56:24    阅读次数:222
[BZOJ4756][Usaco2017 Jan]Promotion Counting 树状数组
4756: [Usaco2017 Jan]Promotion Counting Description The cows have once again tried to form a startup company, failing to remember from past experience ...
分类:编程语言   时间:2017-11-08 17:35:26    阅读次数:218
[USACO16OPEN]关闭农场Closing the Farm_Silver
题目描述 Farmer John and his cows are planning to leave town for a long vacation, and so FJ wants to temporarily close down his farm to save money in the ...
分类:其他好文   时间:2017-11-07 22:13:43    阅读次数:194
[USACO08OPEN]牛的车Cow Cars
题目描述 N (1 <= N <= 50,000) cows conveniently numbered 1..N are driving in separate cars along a highway in Cowtopia. Cow i can drive in any of M differ ...
分类:其他好文   时间:2017-11-07 22:09:08    阅读次数:175
洛谷 P2922 [USACO08DEC]秘密消息Secret Message
P2922 [USACO08DEC]秘密消息Secret Message P2922 [USACO08DEC]秘密消息Secret Message P2922 [USACO08DEC]秘密消息Secret Message 题目描述 Bessie is leading the cows in an a ...
分类:其他好文   时间:2017-11-07 22:07:41    阅读次数:192
洛谷P3605 [USACO17JAN]Promotion Counting晋升者计数
洛谷P3605 [USACO17JAN]Promotion Counting晋升者计数 题目描述 The cows have once again tried to form a startup company, failing to remember from past experience th ...
分类:其他好文   时间:2017-11-06 15:56:02    阅读次数:160
洛谷 P3111 [USACO14DEC]牛慢跑Cow Jog_Sliver
P3111 [USACO14DEC]牛慢跑Cow Jog_Sliver P3111 [USACO14DEC]牛慢跑Cow Jog_Sliver P3111 [USACO14DEC]牛慢跑Cow Jog_Sliver 题目描述 The cows are out exercising their hoo ...
分类:其他好文   时间:2017-11-06 11:21:13    阅读次数:198
洛谷 P2899 [USACO08JAN]手机网络Cell Phone Network(树形动规)
题目描述 Farmer John has decided to give each of his cows a cell phone in hopes to encourage their social interaction. This, however, requires him to set ...
分类:移动开发   时间:2017-11-05 13:14:28    阅读次数:239
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