Light oj 1012

#include <bits/stdc++.h>
using namespace std;
char s[30][30];
int dp[30][30];
void guilty (int i ,int j,int r ,int c)
{
    if(i > r or j > c or i <= 0 or j <= 0) 
        return;

        if(dp[i][j] != -1)
            return;

        else if(s[i][j] == '.' or s[i][j] == '@'){
            dp[i][j] = 1;

        guilty(i , j + 1 , r , c);
        guilty(i - 1 , j , r , c);
        guilty(i , j - 1 , r , c);
         guilty(i + 1, j , r, c);

        }

        else if(s[i][j] == '#') return;


}
int main()
{
    int tes , p = 0;
    cin >> tes;

    while(tes--)
    {
        memset(dp , -1 , sizeof(dp));
        p++;
        int a , b , x , y;
        cin >> a >> b;

       for(int i = 1; i <= b; i++)
        for(int j = 1; j <= a; j++)
       {
         cin >> s[i][j];

         if(s[i][j] == '@')
         {
             x = i;
             y = j;
         }
       }
        guilty(x , y , b, a);
        int c = 0;
        for(int i = 1; i <= b; i++){
            for(int j = 1 ; j <= a; j++){
              if(dp[i][j] == 1)
                c++;

            }

        }
         printf("Case %d: %d\n", p , c);

    }
}