HDU 1241 Oil Deposits

#include<stdio.h>
#include<string.h>
#define MAX 110

int v[MAX][MAX], m, n, ans;
int dir[8][2] = {-1, -1, -1, 0, -1, 1, 0, -1, 0, 1, 1, -1, 1, 0, 1, 1};
char map[MAX][MAX];

void DFS(int x, int y){
int i;
if(map[x][y] == '*' || v[x][y] || x < 0 || y < 0 || x >= m || y >= n){
return ;
}
v[x][y] = 1;
for(i = 0; i < 8; i++){
DFS(x + dir[i][0], y + dir[i][1]);
}
}

int main(){
int i, j, k;
while(scanf("%d%d", &m, &n) && m){
ans = 0;
memset(v, 0, sizeof(v));
getchar();
for(i = 0; i < m; i++){
scanf("%s", &map[i]);
}
for(i = 0; i < m; i++){
for(j = 0; j < n; j++){
if(!v[i][j] && map[i][j] != '*'){
DFS(i, j);
ans++;
}
}
}
printf("%d\n", ans);
}
return 0;
}