Red and Black
#include<stdio.h> #include<string.h> #include<stdlib.h> char map[21][21]; int M,N,res; int xx[4]={0,0,1,-1}; int yy[4]={1,-1,0,0}; int fun(int x,int y) { if(x<0||y<0||x>=N||y>=M) return 0; return 1; } void DFS(int x,int y) { int i,j,x1,y1; map[x][y]='#'; for(i=0;i<4;i++) { x1=x+xx[i]; y1=y+yy[i]; if(map[x1][y1]=='.'&&fun(x1,y1)) { res++; DFS(x1,y1); } } } int main( ) { while(scanf("%d%d",&M,&N)!=EOF) { int i,j,a,b; res=0; getchar(); for(i=0;i<N;i++) { for(j=0;j<M;j++) { scanf("%c",&map[i][j]); if(map[i][j]=='@') { a=i; b=j; } } getchar(); } res++; map[a][b]='#'; DFS(a,b); printf("%d\n",res); } return 0; }
posted on 2011-05-11 03:19 more think, more gains 阅读(136) 评论(0) 编辑 收藏 举报