BNUOJ 1038 Flowers

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春天到了,师大的园丁们又开始忙碌起来了. 京师广场上有一块空地,边界围成了一个多边形,内部被划分成一格一格的.园丁们想在这个多边形内的每一格内种植一些花. 现在请你帮忙计算一下一共最多可以种多少花. 广场用一个M*N的字符数组表示,"."和"*"代表一个方格,其中"*"代表空地的边界,"."是空格,只有边界内部的空格才能用于种花. 一个空格位于边界内部,当且仅当由该点出发只允许向上.下.左.右四个方向移动,最终都会遇到边界.…

bnuoj 33656 J. C.S.I.: P15（图形搜索题）

http://www.bnuoj.com/bnuoj/problem_show.php?pid=33656 [题解]:暴力搜索题 [code]: #include <iostream> #include <stdio.h> #include <string.h> #include <algorithm> #include <queue> using namespace std; ][]; ][]; int n,m; int B,F; ,-,,-,…

CF451E Devu and Flowers （隔板法容斥原理 Lucas定理求逆元）

Codeforces Round #258 (Div. 2) Devu and Flowers E. Devu and Flowers time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Devu wants to decorate his garden with flowers. He has purchased n boxes…

poj 3262 Protecting the Flowers

http://poj.org/problem?id=3262 Protecting the Flowers Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 4930 Accepted: 1965 Description Farmer John went to cut some wood and left N (2 ≤ N ≤ 100,000) cows eating the grass, as usual. When…

Codeforces Round #381 (Div. 2)B. Alyona and flowers(水题)

B. Alyona and flowers Problem Description: Let's define a subarray as a segment of consecutive flowers. The mother suggested some set of subarrays. Alyona wants to choose several of the subarrays suggested by her mother. After that, each of the flowe…

poj1157LITTLE SHOP OF FLOWERS

Description You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto the shelf and are numbered con…