题意: 用1*2和2*1的方块将给定长宽的矩形填满.问有多少种放法,对称的算两种. 分析: 状态压缩dp 首先用0表示前一行没有竖块占用这个位置,而1表示该位置和他上方的位置放了一个竖块,从而压缩状态.接下来一行一行的看,每一行都只受上一行的影响,同时影响着下一行的状态,那么如何将现在的状态和下一行的状态联系起来呢? 令dp[i][j]表示第i行状态为j时的方案数,直接把两个状态作为参数进行DFS,在到达每行行尾时更新 dp[i+1][next];. 看poj的discuss中的方法,对于某一行…

题目: 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 his toilet paper to draw on, for all of his paper was filled with squares and rectangle…

题目:id=2411" target="_blank">poj 2411 Mondriaan's Dream 题意:给出一个n*m的矩阵,让你用1*2的矩阵铺满,然后问你最多由多少种不同的方案. 分析:这是一个比較经典的题目.网上各种牛B写法一大堆.题解也是 我们能够定义状态:dp[i][st]:在第 i 行状态为 st 的时候的最慷慨案数. 然后转移方程:dp[i][st] = sum (dp[i-1][ss]) 即全部的当前行都是由上一行合法的状态转移而来. 而状态…

题目:Mondriaan's Dream 链接:http://poj.org/problem?id=2411 题意:用 1*2 的瓷砖去填 n*m 的地板,问有多少种填法. 思路: 很久很久以前便做过的一道题目,状压DP,当时写得估计挺艰辛的,今天搜插头DP又搜到它,就先用状压DP写了下,顺利多了,没一会就出来了,可惜因为long long没有1A. 思路挺简单,一行一行解决,每一列用1 表示对下一行有影响,用0 表示对下一行没有影响,所以一行最多2048 种可能,然后要筛选一下,因为有些本身就…

[poj P2411] Mondriaan's Dream Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 18023   Accepted: 10327 Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his '…

题目链接: http://poj.org/problem?id=2411 Mondriaan's Dream Time Limit: 3000MSMemory Limit: 65536K 问题描述 Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his 'toilet series' (where he had…

一.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 his toilet paper to draw on, for all of his paper was filled with squares and…

Mondriaan's Dream POJ - 2411 可以用状压dp,但是要打一下表.暴力枚举行.这一行的状态.上一行的状态,判断如果上一行的状态能转移到这一行的状态就转移. 状态定义:ans[i][S]表示i行前已经全部填满,i行已经填上的列为集合S.如果有竖着的,全部当做用这一行的去补满上一行缺的. (貌似还是插头dp的入门题) #include<cstdio> #include<cstring> typedef long long LL; LL f[][]; LL h,w…

Mondriaan's Dream Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 13519   Accepted: 7876 Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his 'toilet series…

状压DP Mondriaan's Dream Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 9938 Accepted: 5750 Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his 'toilet series…