hdu 1241 Oil Deposits

 1 #include<iostream>
 2 #include<cstdio>
 3 using namespace std;
 4 int row,col;
 5 char oil[1000][1000];
 6 int to[8][2]={{-1,-1},{-1,0},{-1,1},{0,1},{1,1},{1,0},{1,-1},{0,-1}};
 7 void dfs(int i,int j)
 8 {
 9     //if(oil[i][j]==‘@‘)
10     if(oil[i][j] != ‘@‘ || i >=row || j >= col || i < 0 || j < 0) return ;
11     oil[i][j] = ‘*‘;
12     for(int k = 0; k < 8; k++)
13         dfs(i + to[k][0],j + to[k][1]);
14 }
15 
16 int main()
17 {
18     freopen("input.txt","r",stdin);
19     int Count;
20     while(cin>>row>>col && row && col)
21     {
22         Count = 0;
23         for(int i = 0; i < row; i++)
24             for(int j = 0; j < col; j++)
25                 cin>>oil[i][j];
26         for(int i = 0; i < row; i++)
27         {
28             for(int j = 0; j < col; j++)
29             {
30                 if(oil[i][j] == ‘@‘)
31                    {
32                         dfs(i,j);Count++;
33                    }
34 
35             }
36         }
37         cout<<Count<<endl;
38     }
39     return 0;
40 }