UVA 572 -- Oil Deposits(DFS求连通块) 图也有DFS和BFS遍历,由于DFS更好写,所以一般用DFS寻找连通块. 下述代码用一个二重循环来找到当前格子的相邻8个格子,也可用常量数组或者写8条DFS调用. 下述算法是:种子填充(floodfill) 两种连通区域 四连通区域:从区域内一点出发,可通过上.下.左.右四个方向的移动组合,在不越出区域的前提下,能到达区域内的任意像素 八连通区域:从区域内每一像素出发,可通过八个方向,即上.下.左.右.左上.右上.左下.右下移动的…

Oil Deposits  The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular region of land at a time, and creates a grid that divides the land into numerous square plots. I…

UVA 572     DFS(floodfill)  用DFS求连通块 Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Description Due to recent rains, water has pooled in various places in Farmer John's field, which is represented by a rectangle of N x M…

 Oil Deposits  The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular region of land at a time, and creates a grid that divides the land into numerous square plots.…

题意:求连通块个数. 分析:dfs. #include<cstdio> #include<cstring> #include<cstdlib> #include<cctype> #include<cmath> #include<iostream> #include<sstream> #include<iterator> #include<algorithm> #include<string&g…

思路:可以用DFS求解.遍历这个二维数组,没发现一次未被发现的‘@’,便将其作为起点进行搜索.最后的答案,是这个遍历过程中发现了几次为被发现的‘@’ import java.util.*; public class Main{ public static void main(String[] args) { Scanner in = new Scanner( System.in ); while( true ) { int rows, cols; rows = in.nextInt(); //…

Description GeoSurvComp地质调查公司负责探測地下石油储藏. GeoSurvComp如今在一块矩形区域探測石油.并把这个大区域分成了非常多小块.他们通过专业设备.来分析每一个小块中是否蕴藏石油. 假设这些蕴藏石油的小方格相邻.那么他们被觉得是同一油藏的一部分. 在这块矩形区域,可能有非常多油藏. 你的任务是确定有多少不同的油藏. Input 输入可能有多个矩形区域(就可以能有多组測试).每一个矩形区域的起始行包括m和n.表示行和列的数量,1<=n,m<=100,假设m =0…

题意 :输入一个m行n列的字符矩阵,统计字符“@”组成多少个八连块.如果两个字符“@”所在的格子相邻(横竖以及对角方向),就是说它们属于同一个八连块. 分析 :可以考虑种子填充深搜的方法.两重for循环枚举所有的点,然后只要是@点且还没被染色过则从这个点出发到达相邻的点染成同样的色(这里的颜色可以用不同的数字来表示),然后每一块@的联通块都能通过这种方式求出来,详情可以参考Wiki百科的动画帮助理解=>http://en.widipedia.org/wiki/Floodfill #include…

/* Oil Deposits Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 37990 Accepted Submission(s): 22039 Problem Description The GeoSurvComp geologic survey company is responsible for detecting undergr…

The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular region of land at a time, and creates a grid that divides the land into numerous square plots. It then analyze…