```cpp
int bfs(int x,int y)
```
改成
```cpp
void bfs(int x,int y)
```
by __yun__ @ 2024-08-31 22:18:59
或者关掉`O2`
by __yun__ @ 2024-08-31 22:19:42
@[__yun__](/user/749539) 谢已关
by liruizhou_lihui @ 2024-08-31 22:33:20