杭电1241 Oil Deposits

#include<iostream>
#include<string>
using namespace std;


const int maxn = 105;
string map[maxn];
int row, column, res;


void dfs(int x, int y)
{//深度搜索 
map[x][y] = '*';//遍历过的做上记号 
for (int dx = -1; dx <= 1; dx++) {
for (int dy = -1; dy <= 1; dy++) {
int nx = x + dx;
int ny = y + dy;
if (0 <= nx&&nx < row && 0 <= column&&ny < column&&map[nx][ny] == '@')
dfs(nx, ny);
}//*米 3*3 =9 但是map[x][y]本身被标记了，所以是八个方向 
}
return;
}


void solve()
{
res = 0;
for (int i = 0; i < row; i++)
{
for (int j = 0; j < column; j++)
{
if (map[i][j] == '@') {
dfs(i,j);
res++;
}
}
}
}


int main()
{
//freopen("data.in","r",stdin); 
while (cin >> row >> column, row || column)
{
for (int i = 0; i < row; i++)
cin >> map[i];
solve();
cout<<res<<endl; 
}
return 0;
}