题目链接 题意 : 问一个m×n的矩形中,有多少个pocket,如果两块油田相连(上下左右或者对角连着也算),就算一个pocket . 思路 : 写好8个方向搜就可以了,每次找的时候可以先把那个点直接变为*,这样可以避免重复搜索. //POJ 1562 ZOJ 1709 #include <stdio.h> #include <string.h> #include <iostream> #include <stack> #include <algori…

Oil Deposits Time Limit: 2 Seconds      Memory Limit: 65536 KB 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 th…

HDU 1241 题目大意:给定一块油田,求其连通块的数目.上下左右斜对角相邻的@属于同一个连通块. 解题思路:对每一个@进行dfs遍历并标记访问状态,一次dfs可以访问一个连通块,最后统计数量. /* HDU 1241 Oil Deposits --- 入门DFS */ #include <cstdio> int m, n; //n行m列 ][]; /* 将和i,j同处于一个连通块的字符标记出来 */ void dfs(int i, int j){ || j < || i >=…

HDU 1241  Oil Deposits L -DFS Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%I64d & %I64u   Description The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large r…

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 Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 4   Accepted Submission(s) : 3 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description The GeoSurvComp geologic s…

Problem Description 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 pl…

[本博文非博主原创,均摘自:刘汝佳<算法竞赛入门经典>(第2版) 6.4 图] [程序代码根据书中思路,非独立实现] 例题6-12 油田(Oil Deposits,UVa572) 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.纵或者对角线方向),就说它们属于一个八连块.例如,下图中有两个八连块. 一.分析 1.1 整体思路 图也有DFS和BFS遍历.由于DFS更容易编写,一般用DFS查找连通块:从每个"@"格子出发,递归遍…

Description 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…

Oil Deposits Descriptions: 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 sq…

题目链接:Oil Deposits 解析:问有多少个"@"块.当中每一个块内的各个"@"至少通过八个方向之中的一个相邻. 直接从"@"的地方開始向相邻八个方向搜索,每搜到一个格子.就将它替换成".",一次搜索就会搜索完一个块,记录搜索的次数为答案. AC代码: #include <cstdio> #include <cstring> #include <queue> using namesp…

解题思路:第一道DFS的题目--- 参看了紫书和网上的题解-- 在找到一块油田@的时候,往它的八个方向找,直到在能找到的范围内没有油田结束这次搜索 可以模拟一次DFS,比如说样例 在i=0,j=1时,发现第一块油田,对它DFS,这样经过一次DFS,所有的油田都被找出来了,被记0 Oil Deposits Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submiss…

http://poj.org/problem?id=2386 http://acm.hdu.edu.cn/showproblem.php?pid=1241 求有多少个连通子图.复杂度都是O(n*m). #include <cstdio> ][]; int n,m; void dfs(int x,int y) { ;i<=;i++) ;j<=;j++) //循环遍历8个方向 { int xx=x+i,yy=y+j; &&xx<n&&yy>=…

题目链接 http://poj.org/problem?id=1562 题意 输入一个m行n列的棋盘,棋盘上每个位置为'*'或者'@',求'@'的连通块有几个(连通为8连通,即上下左右,两条对角线). 思路 floodfill问题,用dfs解决. 代码 #include <iostream> #include <cstdio> #include <cstring> using namespace std; ; char grid[N][N]; int visit[N][…

GeoSurvComp地质调查公司负责探测地下石油储藏. GeoSurvComp现在在一块矩形区域探测石油,并把这个大区域分成了很多小块.他们通过专业设备,来分析每个小块中是否蕴藏石油.如果这些蕴藏石油的小方格相邻,那么他们被认为是同一油藏的一部分.在这块矩形区域,可能有很多油藏.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(即可能有多组测试).每个矩形区域的起始行包含m和n,表示行和列的数量,1<=n,m<=100,如果m =0表示输入的结束,接下来是n行,每行m个字…

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…

Avoid The Lakes Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6795   Accepted: 3622 Description Farmer John's farm was flooded in the most recent storm, a fact only aggravated by the information that his cows are deathly afraid of wate…

最水的一道石油竟然改了一个小时,好菜好菜. x<=r  y<=c  x<=r  y<=c  x<=r  y<=c  x<=r y<=c #include<stdio.h> #include<algorithm> #include<string.h> using namespace std; ][]={,, ,-, ,, -,, ,, ,-, -,, -,-}; int r,c; ][]; int ans; void dfs…

题目链接 https://cn.vjudge.net/contest/65959#problem/L 题意 @表示油田 如果 @@是连在一起的 可以八个方向相连 那么它们就是 一块油田 要找出 一共有几块油田 思路 可以先遍历 一遍地图 遇到 @ 就更新答案 + 1 然后DFS 把与它相连 和与它相连的 相连的 油田 都变成 * 就可以了 AC代码 #include <cstdio> #include <cstring> #include <ctype.h> #incl…

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…

背景描述 ztw同志负责探测地下石油储藏.ztw现在在一块矩形区域探测石油.他通过专业设备,来分析每个小块中是否蕴藏石油.如果这些蕴藏石油的小方格相邻(横向相邻,纵向相邻,还有对角相邻),那么它们被认为是同一油藏的一部分.在这块矩形区域,可能有很多油藏.你的任务是确定有多少不同的油藏. 输入 输入可能有多个矩形区域(即可能有多组测试).每个矩形区域的起始行包含m和n,表示行和列的数量,1<=n,m<=100,如果m=0表示输入的结束,接下来是n行,每行m个字符.每个字符对应一个小方格,并且要么…

Oil Deposits Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14628   Accepted: 7972 Description The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular r…

Oil Deposits Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 16655   Accepted: 8917 Description The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular r…

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. It…

Description 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…

http://poj.org/problem?id=1562                                                                                                    Oil Deposits Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 12595   Accepted: 6868 Description The GeoSurv…

Oil Deposits Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 14462   Accepted: 7875 Description The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large rectangular r…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 15291    Accepted Submission(s): 8787 Problem Description The GeoSurvComp geologic survey company is responsible for detecting underground oil dep…

Oil Deposits Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 8274 Accepted Submission(s): 4860 Problem Description The GeoSurvComp geologic survey company is responsible for detecting underground…

  技巧:遍历8个方向 ; dr <= ; dr++) ; dc <= ; dc++) || dc != ) dfs(r+dr, c+dc, id); 我的解法: #include<cstdio> #include<cstring> #include<iostream> #include<string> #include<algorithm> using namespace std; ; char buf[N][N]; int m,…