1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
| #include <cstdio>
int W, H;
char tile[25][25];
int pos_x, pos_y;
int sh_x[4] = {0, 0, -1, 1};
int sh_y[4] = {1, -1, 0, 0};
int res = 0;
void solve(int x, int y)
{
tile[y][x] = '#';
res++;
for (int i=0;i<4;i++) {
int new_x = x + sh_x[i];
int new_y = y + sh_y[i];
if (new_x >= 0 && new_x <W && new_y >=0 && new_y < H && tile[new_y][new_x] != '#') {
solve(new_x, new_y);
}
}
}
int main()
{
while (1)
{
scanf("%d %d", &W, &H);
getchar();
if (!W && !H) {
break;
}
for (int i = 0; i < H; i++) {
fgets(tile[i], 25, stdin);
tile[i][W] = '#';
}
for (int i=0;i<H;i++) {
for (int j=0;j<W;j++) {
if (tile[i][j] == '@') {
pos_x = j;
pos_y = i;
}
if (i==H-1) {
tile[H][j] = '#';
}
}
}
solve(pos_x, pos_y);
printf("%d\n", res);
res = 0;
}
return 0;
}
|
