```cpp
if(cnt==0)
return 1;
```
--->
```
if(cnt==0){
b[x][y]=1;
return 1;
}
```
by qnqfff @ 2023-11-13 21:20:11
@[gaojizhe05](/user/699271)
by qnqfff @ 2023-11-13 21:21:24
真过了！！！感谢大佬，送大佬一个关注！！！
by gaojizhe05 @ 2023-11-13 21:23:38