随笔分类 -  dp专题

zoj 3822 概率期望dp入门
摘要：Description Edward is the headmaster of Marjar University. He is enthusiastic about chess and often plays chess with his friends. What's more, he bought a large decorativ... 阅读全文
posted @ 2016-04-20 14:20 ZhMZ 阅读(361) 评论(0) 推荐(0)
hdu 4405 Aeroplane chess 概率dp入门题
摘要：Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step he throws a dice(a dice have si... 阅读全文
posted @ 2016-04-13 19:31 ZhMZ 阅读(225) 评论(0) 推荐(0)
hdu 5001 walk 概率dp入门题
摘要：Description I used to think I could be anything, but now I know that I couldn't do anything. So I started traveling. The nation looks like a connected bidirecti... 阅读全文
posted @ 2016-04-12 21:37 ZhMZ 阅读(471) 评论(0) 推荐(0)
hdu 3586 Information Disturbing 树形dp+二分
摘要：Description In the battlefield , an effective way to defeat enemies is to break their communication system. The information department told you that there are n... 阅读全文
posted @ 2016-04-09 20:23 ZhMZ 阅读(223) 评论(0) 推荐(0)
hdu 2296 Ring AC自动机+DP
摘要：Description For the hope of a forever love, Steven is planning to send a ring to Jane with a romantic string engraved on. The string's length should not exceed N. The car... 阅读全文
posted @ 2016-04-09 19:11 ZhMZ 阅读(203) 评论(0) 推荐(0)
hdu 1520 Anniversary party 树形dp水题
摘要：Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees. It mea... 阅读全文
posted @ 2016-04-06 19:32 ZhMZ 阅读(171) 评论(0) 推荐(0)
hdu 1561 The more, The Better 树形dp水题
摘要：Description ACboy很喜欢玩一种战略游戏，在一个地图上，有N座城堡，每座城堡都有一定的宝物，在每次游戏中ACboy允许攻克M个城堡并获得里面的宝物。但由于地理位置原因，有些城堡不能直接攻克，要攻克这些城堡必须先攻克其他某一个特定的城堡。你能帮ACboy算出要获得尽量多的宝物应该攻克哪M个城堡吗？ Input... 阅读全文
posted @ 2016-04-06 18:55 ZhMZ 阅读(190) 评论(0) 推荐(0)
CF 581F Contest Page 树形DP
摘要：Description It's election time in Berland. The favorites are of course parties of zublicanes and mumocrates. The election campaigns of both parties include numerous demon... 阅读全文
posted @ 2016-04-03 11:56 ZhMZ 阅读(1409) 评论(0) 推荐(0)
poj 1185 状态压缩
摘要：Description 司令部的将军们打算在N*M的网格地图上部署他们的炮兵部队。一个N*M的地图由N行M列组成，地图的每一格可能是山地（用"H" 表示），也可能是平原（用"P"表示），如下图。在每一格平原地形上最多可以布置一支炮兵部队（山地上不能够部署炮兵部队）；一支炮兵部队在地图上的攻击范围如图 阅读全文
posted @ 2016-03-27 16:50 ZhMZ 阅读(180) 评论(0) 推荐(0)
hdu 3001 Travelling 旅行商问题变形 三进制的压缩dp
摘要：Description After coding so many days,Mr Acmer wants to have a good rest.So travelling is the best choice!He has decided to visit n cities(he insists on seeing all the ci... 阅读全文
posted @ 2016-03-25 13:56 ZhMZ 阅读(318) 评论(0) 推荐(0)
poj 3311 Hie with the Pie 旅行商问题变形 记录最短路径压缩状态
摘要：Description The Pizazz Pizzeria prides itself in delivering pizzas to its customers as fast as possible. Unfortunately, due to cutbacks, they can afford to hire only one ... 阅读全文
posted @ 2016-03-24 21:33 ZhMZ 阅读(460) 评论(0) 推荐(0)
poj 2411 Mondriaan's Dream 状态压缩dp
摘要：Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his 'toilet series' (where he had to use... 阅读全文
posted @ 2016-03-21 18:46 ZhMZ 阅读(224) 评论(0) 推荐(0)
hdu4758 hdu2825 hdu4057 AC自动机与状态压缩dp的结合
摘要：最近做到好几道关于AC自动机与状态压缩dp的结合的题，这里总结一下。 题目一般会给出m个字符串，m不超过10，然后求长度为len并且包含特定给出的字符串集合的字符串个数。 以HDU 4758为例： 把题意抽象为：给出两个字符串，且只包含两种字符 'R'、'D'，现在求满足下列条件的字符串个数： 1、字符串必须包含上述两个字符串。 2、字符串长度为(m+n)，其中包含n个'D'，m个'R'... 阅读全文
posted @ 2016-03-18 18:24 ZhMZ 阅读(241) 评论(0) 推荐(0)
hdu 4568 旅行商问题dp
摘要：这个题目题意描述不清，没有说明只能进入一次。 题目意思很好理解，不再重复。 思路也比较好想，先计算每两个宝藏区的最短路，和每个宝藏区到边界的最短路，然后dp解决。 在计算最短路的时候，用优先队列优化的Dijkstra算法。 在-1的处理上有些小技巧。 但是！但是！！，我之前的思路是dp[i]表示状态 阅读全文
posted @ 2016-03-15 21:21 ZhMZ 阅读(528) 评论(0) 推荐(0)
[dp专题-四边形不等式优化]51nod 1022
摘要：1021石子归并V1 N堆石子摆成一条线。现要将石子有次序地合并成一堆。规定每次只能选相邻的2堆石子合并成新的一堆，并将新的一堆石子数记为该次合并的代价。计算将N堆石子合并成一堆的最小代价。 例如： 1 2 3 4，有不少合并方法 1 2 3 4 => 3 3 4(3) => 6 4(9) => 10(19) 1 2 3 4 => 1 5 4(5) => 1 9(14) ... 阅读全文
posted @ 2016-03-10 19:03 ZhMZ 阅读(332) 评论(0) 推荐(0)
[dp专题-状态压缩dp] 51nod 1033
摘要：在m*n的一个长方形方格中，用一个1*2的骨牌排满方格。问有多少种不同的排列方法。（n #include #include #include using namespace std; typedef long long ll; const int mod=1e9+7; ll dp[1n) return; ... 阅读全文
posted @ 2016-03-10 13:24 ZhMZ 阅读(459) 评论(0) 推荐(0)