考虑计数拆开贡献. 因为在一个方案中一个格子最多只会贡献一次,那么不妨反过来求这个格子贡献了多少次. 然后发现,行列独立,那么我们单独计算红蓝色,即可. 一个偶数块贡献当且仅当前面也是偶数块. 然后显然其他不在同一行/同一列的块就直接随便乱取就行了. #include<iostream> #include<cstdio> #include<vector> #define N 300005 #define mod 998244353 #define ll long lon…

Dominoes Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6731   Accepted: 2234 Description A domino is a flat, thumbsized tile, the face of which is divided into two squares, each left blank or bearing from one to six dots. There is a ro…

Solid Dominoes Tilings Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 235    Accepted Submission(s): 143 Problem Description Dominoes are rectangular tiles with nice 2 × 1 and 1 × 2 sizes. The…

题目链接:uva 11270 - Tiling Dominoes 题目大意:用1∗2木块将给出的n∗m大小的矩阵填满的方法总数. 解题思路:插头dp的裸题,dp[i][s]表示第i块位置.而且该位置相应的行数的状态为s的时候的总情况数.0表示为竖放预留留的位置,1表示填上的位置.无论是竖放还是横放.而且第一位状态用滚动数组优化空间. #include <cstdio> #include <cstring> #include <algorithm> using names…

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud D. Xenia and Dominoes Xenia likes puzzles very much. She is especially fond of the puzzles that consist of domino pieces. Look at the picture that shows one of such puzzles. A puzzle is a 3 ×…

称号:ZOJ Problem Set - 2563 Long Dominoes 题意:给出1*3的小矩形.求覆盖m*n的矩阵的最多的不同的方法数? 分析:有一道题目是1 * 2的.比較火.链接:这里 这个差点儿相同,就是当前行的状态对上一行有影响.对上上一行也有影响.所以 定义状态:dp[i][now][up]表示在第 i 行状态为now .上一行状态为 up 时的方案数. 然后转移方程:dp[i][now][up] = sum ( dp[i-1][up][uup] ) 前提是合法 合法性的推断…

Problem Statement We have a board with a 2×N grid. Snuke covered the board with N dominoes without overlaps. Here, a domino can cover a 1×2 or 2×1 square. Then, Snuke decided to paint these dominoes using three colors: red, cyan and green. Two domino…

There are N dominoes in a line, and we place each domino vertically upright. In the beginning, we simultaneously push some of the dominoes either to the left or to the right. After each second, each domino that is falling to the left pushes the adjac…

There are N dominoes in a line, and we place each domino vertically upright. In the beginning, we simultaneously push some of the dominoes either to the left or to the right. After each second, each domino that is falling to the left pushes the adjac…

题目描述Orz likes to play dominoes. Now giving an n*m chessboard and k dominoes whose size are 1*2, Orz finds that there is exactly one grid empty, so that he can move dominoes without overlapping them. An initial situation is given, he wants to know how…