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poj3171 Cleaning Shifts【线段树(单点修改区间查询)】【DP】
Cleaning Shifts Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 4422 Accepted: 1482 Description Farmer John's cows, pampered since birth, h ...
分类:其他好文   时间:2018-10-18 10:53:36    阅读次数:126
18.10.15 POJ 2182 Lost Cows(线段树)
描述 N (2 <= N <= 8,000) cows have unique brands in the range 1..N. In a spectacular display of poor judgment, they visited the neighborhood 'watering h ...
分类:其他好文   时间:2018-10-16 02:12:42    阅读次数:204
P2017 [USACO09DEC]晕牛Dizzy Cows
图论日常不会系列。。。 题意:给定有向边和无向边,然后给每一条无向边定向,使得到的图无环。 我本来想缩一下点的,但是越想越晕。 然后就翻了题解,恍然大悟。。。 其实只需要给只有有向边的图跑一次toposort。然后把无向边的定向看做是在添加有向边。 显然不要违反拓扑序来添加有向边,这个图就不可能有环 ...
分类:其他好文   时间:2018-10-15 23:22:06    阅读次数:206
P2881 [USACO07MAR]排名的牛Ranking the Cows
bitset优化传递闭包模板题 这种关系直接用图论来建模就是了,其实就是一个传递闭包。 传递闭包有一个朴素的做法就是floyd。 而这道题的范围是$n \leq 1000$,$n^3$的暴力显然会T。 而使用bitset,听说可以优化到原做法的$\frac{1}{32}$甚至更好! 直接给代码~~其 ...
分类:其他好文   时间:2018-10-15 23:19:44    阅读次数:212
POJ 3276 Face The Right Way
http://poj.org/problem?id=3276 Description Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good ...
分类:其他好文   时间:2018-10-15 20:39:23    阅读次数:127
Popular Cows(POJ 2186)
原题如下: Popular Cows Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 40746 Accepted: 16574 Description Every cow's dream is to become the mos ...
分类:其他好文   时间:2018-10-15 18:23:43    阅读次数:170
[Luogu3069][USACO13JAN]牛的阵容Cow Lineup
题目描述 Farmer John's N cows (1 <= N <= 100,000) are lined up in a row. Each cow is identified by an integer "breed ID" in the range 0...1,000,000,000; t ...
分类:其他好文   时间:2018-10-14 00:26:24    阅读次数:153
股票市场Stock Market(luogu 2938)
题目描述 Despite their innate prudence, the cows took a beating in the home mortgage market and now are trying their hand at stocks. Happily, Bessie is pr ...
分类:其他好文   时间:2018-10-12 13:46:48    阅读次数:172
Recursive sequence(HDU5950 矩阵快速幂)
题目: Farmer John likes to play mathematics games with his N cows. Recently, they are attracted by recursive sequences. In each turn, the cows would sta ...
分类:其他好文   时间:2018-10-11 01:31:11    阅读次数:193
P2915 [USACO08NOV]奶牛混合起来Mixed Up Cows
P2915 [USACO08NOV]奶牛混合起来Mixed Up Cows 约翰家有N K$ 即可转移 最后统计所有牛都用上, 不同牛结尾的方案数总和即可 Code cpp include include include include include include define LL long ...
分类:其他好文   时间:2018-10-09 19:02:36    阅读次数:158
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