@[周一章](/user/384730)
```cpp
#define getchar getchar_unlocked
```
by Lzl_Doctor @ 2024-04-04 17:26:53
直接在循环里每次读入一个字符避免用数组：
```
int main() {
n = read(), m = read();
for (register int i = 0; i < n; i++) {
for (register int j = 0; j < m; j++) {
char c; while (isspace(c = getchar());
left_up = (m + 1) * i + j + 1;
right_up=(m + 1) * i + j + 2;
left_down = (m + 1) * (i + 1) + j + 1;
right_down = (m + 1) * (i + 1) + j + 2;
if (c == 92) {
add(left_up, right_down, 0);
add(right_down, left_up, 0);
add(left_down, right_up, 1);
add(right_up, left_down ,1);
}
if (c == 47) {
add(left_down, right_up, 0);
add(right_up, left_down, 0);
add(left_up, right_down, 1);
add(right_down, left_up, 1);
}
}
}
Dijkstra();
}
by Lzl_Doctor @ 2024-04-04 17:31:20
@[周一章](/user/384730) 用关掉同步流的cin
by hanm @ 2024-04-04 17:34:14