标签:dfs
水题保平安
Time Limit: 1000MS | Memory Limit: 30000K | |
Total Submissions: 22640 | Accepted: 12223 |
Description
Input
Output
Sample Input
6 9 ....#. .....# ...... ...... ...... ...... ...... #@...# .#..#. 11 9 .#......... .#.#######. .#.#.....#. .#.#.###.#. .#.#..@#.#. .#.#####.#. .#.......#. .#########. ........... 11 6 ..#..#..#.. ..#..#..#.. ..#..#..### ..#..#..#@. ..#..#..#.. ..#..#..#.. 7 7 ..#.#.. ..#.#.. ###.### ...@... ###.### ..#.#.. ..#.#.. 0 0
Sample Output
45 59 6 13
#include <stdio.h> #include <stdlib.h> #include <malloc.h> #include <ctype.h> #include <limits.h> #include <string.h> #include <string> #include <math.h> #include <algorithm> #include <iostream> #include <queue> #include <stack> #include <deque> #include <vector> #include <set> //#include <map> using namespace std; #define MAXN 20 + 5 char map[MAXN][MAXN]; int w,h; int vis[MAXN][MAXN]; int num; void DFS(int x,int y){ if(x-1>=0&&x-1<h&&y>=0&&y<w&&vis[x-1][y]==0){ if(map[x-1][y] == '.'){ num++; vis[x-1][y] = 1; DFS(x-1,y); } } if(x>=0&&x<h&&y+1>=0&&y+1<w&&vis[x][y+1]==0){ if(map[x][y+1] == '.'){ num++; vis[x][y+1] = 1; DFS(x,y+1); } } if(x+1>=0&&x+1<h&&y>=0&&y<w&&vis[x+1][y]==0){ if(map[x+1][y] == '.'){ num++; vis[x+1][y] = 1; DFS(x+1,y); } } if(x>=0&&x<h&&y-1>=0&&y-1<w&&vis[x][y-1]==0){ if(map[x][y-1] == '.'){ num++; vis[x][y-1] = 1; DFS(x,y-1); } } } int main(){ int i,j; while(~scanf("%d%d",&w,&h)){ if(w==0 && h==0){ break; } for(i=0;i<h;i++){ scanf("%s",map[i]); } memset(vis,0,sizeof(vis)); int flag = 0; for(i=0;i<h;i++){ for(j=0;j<w;j++){ if(map[i][j] == '@'){ vis[i][j] = 1; num = 0; DFS(i,j); flag = 1; break; } } if(flag == 1){ break; } } printf("%d\n",num+1); } return 0; }
标签:dfs
原文地址:http://blog.csdn.net/zcr_7/article/details/39156515