oil deposits——广搜
来源:互联网 发布:ecshop 首页广告 js 编辑:程序博客网 时间:2024/06/10 07:36
Oil Deposits
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 plots. It then analyzes each plot separately, using sensing equipment to determine whether or not the plot contains oil. A plot containing oil is called a pocket. If two pockets are adjacent, then they are part of the same oil deposit. Oil deposits can be quite large and may contain numerous pockets. Your job is to determine how many different oil deposits are contained in a grid.
Input
The input file contains one or more grids. Each grid begins with a line containing m and n, the number of rows and columns in the grid, separated by a single space. If m = 0 it signals the end of the input; otherwise 1 <= m <= 100 and 1 <= n <= 100. Following this are m lines of n characters each (not counting the end-of-line characters). Each character corresponds to one plot, and is either *’, representing the absence of oil, or@’, representing an oil pocket.
Output
For each grid, output the number of distinct oil deposits. Two different pockets are part of the same oil deposit if they are adjacent horizontally, vertically, or diagonally. An oil deposit will not contain more than 100 pockets.
Sample Input
1 1
*
3 5
@@*
@
@@*
1 8
@@*@
5 5
**@
@@@
@*@
@@@*@
@@**@
0 0
Sample Output
0
1
2
2
大致题意:遇到‘@’便在八个方向搜索,同样是‘@’化为一堆,计算一共有几堆。
以下是AC代码(用广搜做的):
#include<stdio.h>#include<math.h>#include<string.h>#include<queue>using namespace std;int book[105][105];//标记已经被搜索过的油田int n,m;int f[8][2]={{1,0},{0,1},{0,-1},{-1,0},{1,1},{1,-1},{-1,1},{-1,-1}};//在八个方向进行搜索char aa[105][105];struct lyf{ int x,y;};int bfs(int a,int b){ lyf yy,ff; yy.x=a; yy.y=b; queue<lyf>q; q.push(yy); while(!q.empty()) { ff=q.front(); q.pop(); int i; for(i=0;i<8;i++) { yy.x=ff.x+f[i][0]; yy.y=ff.y+f[i][1]; if(yy.x>=0&&yy.x<n&&yy.y>=0&&yy.y<m&& book[yy.x][yy.y]==0&&aa[yy.x][yy.y]=='@') { aa[yy.x][yy.y]='*';//将遍及过的油田转化为‘*’,以免再次被搜到,其实是和book一样的功能 book[yy.x][yy.y]=1; q.push(yy);//搜到的油田进入队列,按照先进先出的顺序,依次对每块油田向它的八个方向搜索 } } }}int main(){ while(~scanf("%d%d",&n,&m)) { if(n==0&&m==0) { return 0; } memset(book,0,sizeof(book)); int i,j; for(i=0;i<n;i++) { scanf("%s",&aa[i]); } int s; s=0; for(i=0;i<n;i++) { for(j=0;j<m;j++) { if(aa[i][j]=='@') { book[i][j]=1; bfs(i,j); s++; } } } printf("%d\n",s); }}
题目传送门:Oil Deposits(点击可交题)
- oil deposits——广搜
- Oil Deposits (广搜)
- hdu1241——Oil Deposits(广搜的简单应用)
- HDU--杭电--1241--Oil Deposits--广搜
- 杭电-1241 Oil Deposits(广搜)
- Uva572——Oil Deposits
- oil deposits——深搜
- 搜索—Problem_1011-Oil Deposits
- 深搜——UVA_572 - Oil Deposits
- Oil Deposits——在图中找油田
- HDU——1241 Oil Deposits
- 【hdu1241】Oil Deposits——dfs/bfs
- uva 572 oil deposits——yhx
- uva 572 oil deposits——yhx
- hdu1241——Oil Deposits(DFS)
- Oil Deposits——个人c++解
- Oil Deposits ——DFS&&BFS
- POJ 1562/ ZOJ 1709: Oil Deposits(我的深搜第一题,其实也可用广搜)
- javascript getElementById 使用方法及用法
- poj 1236
- Delegate in UnrealEngine ——虚幻四中的委托
- 交换机开发(二)—— 三层交换机报文转发过程
- acm 算法竞赛 时间
- oil deposits——广搜
- 牛刀小试(一):垂直菜单
- 快速幂 快速乘法
- maven依赖包冲突问题
- Web工程目录和tomcat目录
- 文章标题
- UVa 1590 IP Networks
- 博学之,审问之,慎思之,明辨之,笃行之
- mysql 索引