@[i_will_ak_ioi](/user/671260) 昵称勇士，再也不怕被jc了！~~关于前几天出现@[kkksc03SBSBSB](/user/603449) 的昵称这件事~~
by Liking_Cpp_In_Luogu @ 2022-04-02 18:08:32
另外，右下左上建议用LDRU,下次万一右下左上不是东南西北就完蛋了
by Liking_Cpp_In_Luogu @ 2022-04-02 18:10:11
@[Liking_Cpp_In_Luogu](/user/705620)
这个地图又不会旋转，所以东南西北肯定是右下左上啊
所以您找出我的错误了吗
by Nekomusume @ 2022-04-02 18:53:37
@[i_will_ak_ioi](/user/671260) 那您还是捞一下吧，我太菜了。
by Liking_Cpp_In_Luogu @ 2022-04-02 18:55:03
您也没看出错误吗
唉
by Nekomusume @ 2022-04-02 18:56:28
@[Liking_Cpp_In_Luogu](/user/705620)
by Nekomusume @ 2022-04-02 18:58:22
@[i_will_ak_ioi](/user/671260) 为什么不用向量数组啊？
by happybob @ 2022-04-02 19:37:14
@[happybob](/user/332914)
~~向量数组是什么啊~~
by Nekomusume @ 2022-04-02 19:38:36
@[i_will_ak_ioi](/user/671260) 你这样写可读性太差了，就是例如四联通写个这个：
```cpp
int dx[4] = { 0, 0, -1, 1 };
int dy[4] = { -1, 1, 0, 0 };
for (int i = 0; i < 4; i++)
{
int newx = l.x + dx[i];
int newy = l.y + dy[i];
}
```
by happybob @ 2022-04-02 19:42:21
@[happybob](/user/332914) 哦，就是写个偏移量数组啊
by Nekomusume @ 2022-04-02 19:43:28