@[dingyd_](/user/894224) dfs写溢出了
by _JTG_rabbit_ @ 2024-08-15 10:39:58
```cpp
if(i<0||j<0||i>n+1||j>n+1||c[i][j]==1||c[i][j]==0) return ;
//c[i][j]==0 则说明该位置已被搜索过了
//不加它可能会导致 无穷递归MLE
```
by 16squareZ @ 2024-08-15 10:44:50
@[16squareZ](/user/1032705) 感谢大佬%%%
by dingyd_ @ 2024-08-15 11:07:35