HDU 1312 Red and Black
来源:互联网 发布:2015刷q币软件 编辑:程序博客网 时间:2024/05/16 19:08
看了好多天的DFS,基本上的程序都是要借助解题报告才可以实现
但是这一题,确实依照自己的思路,完全靠自己写出来的,或许比较简单吧,所以特此发表下文章,犒劳一下自己,再接再厉
http://acm.hdu.edu.cn/showproblem.php?pid=1312
Red and Black
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 2364 Accepted Submission(s): 1551Problem DescriptionThere is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. From a tile, he can move to one of four adjacent tiles. But he can't move on red tiles, he can move only on black tiles.
Write a program to count the number of black tiles which he can reach by repeating the moves described above.InputThe input consists of multiple data sets. A data set starts with a line containing two positive integers W and H; W and H are the numbers of tiles in the x- and y- directions, respectively. W and H are not more than 20.
There are H more lines in the data set, each of which includes W characters. Each character represents the color of a tile as follows.
'.' - a black tile
'#' - a red tile
'@' - a man on a black tile(appears exactly once in a data set)OutputFor each data set, your program should output a line which contains the number of tiles he can reach from the initial tile (including itself).Sample Input6 9....#......#..............................#@...#.#..#.11 9.#..........#.#######..#.#.....#..#.#.###.#..#.#..@#.#..#.#####.#..#.......#..#########............11 6..#..#..#....#..#..#....#..#..###..#..#..#@...#..#..#....#..#..#..7 7..#.#....#.#..###.###...@...###.###..#.#....#.#..0 0Sample Output4559613#include<iostream>#include<string.h>#include<stdio.h>using namespace std;int direct[4][2] = { -1, 0, 1, 0, 0, 1, 0, -1 }; /*定义方向, 左右,上下*/char map[21][21]; /*输入的字符串*/bool mark[21][21]; /*标记走过的路程*/bool flag;int W, H;int Dx, Dy; //记录起始位置@,从这里开始进行搜索int ans; //记录满足的个数。初始化为1,因为@也包含在内/*****底下是核心算法,主要是从上下左右这四个方向进行搜索,注意满足搜索的条件是不能越界,不能是#,还有就是没有搜索过的--》主要是靠mark[i][j]来实现*******/void DFS( int x, int y ){ mark[x][y] = true; for( int k = 0; k < 4; k ++ ) { int p = x + direct[k][0]; int q = y + direct[k][1]; if( p >= 0 && q >= 0 && p < H && q < W && !mark[p][q] && map[p][q] != '#' ) { ans ++; DFS( p, q ); } } return;}int main(){ int i, j, k; while( cin >> W >> H && ( W || H ) ) // W -> column, H -> row; { memset( mark, false, sizeof( mark ) ); for( i = 0; i < H; i ++ ) for( j = 0; j < W; j ++ ) { cin >> map[i][j]; if( map[i][j] == '@' ) { Dx = i; Dy = j; } } ans = 1; DFS( Dx, Dy ); cout << ans << endl; }}
- Red and Black hdu 1312
- HDU 1312 Red and Black
- HDU 1312 Red and Black
- hdu 1312 Red and Black
- Hdu 1312 - Red and Black
- hdu-1312-Red and Black
- hdu 1312Red and Black
- hdu 1312 Red and Black
- hdu - 1312 - Red and Black
- hdu 1312 Red and Black
- hdu 1312 Red and Black
- HDU-1312(red and black)
- HDU 1312 Red and Black
- hdu 1312 Red and Black
- HDU 1312 Red and Black
- hdu 1312 Red and Black
- hdu 1312 Red and Black
- hdu 1312 Red and Black
- C++ 中获取shell脚本返回值
- dfsdfsdfsdf
- 使用Google Code + SVN进行多人开发(转)
- 【PM&PM】项目经理和产品经理的区别(转)
- make xxx Is a directory. Stop.
- HDU 1312 Red and Black
- 初始化控件
- 李开复周鸿祎谈乔布斯
- WinForm下的键盘事件(KeyPress、KeyDown)及如何处理不响应键盘事件
- SharePoint 2010 网站集 备份 还原
- C的xml编程-libxml2
- 如何在桌面添加AppWidget
- 汇编指令
- RSS技术的原理