@[LabmemNo_012LzTopic](/user/1148832)
`a*d`和`b*c`没考虑，例如：
```
a=-2
b=INT_MIN
c=-2
d=0
```
by small_lemon_qwq @ 2024-02-15 09:49:37
`INT_MIN=-2147483648`
by small_lemon_qwq @ 2024-02-15 09:50:29
<https://www.luogu.com.cn/record/146898550>
by small_lemon_qwq @ 2024-02-15 09:53:37
~~求关注~~
by small_lemon_qwq @ 2024-02-15 09:54:56
@[kkksc999](/user/715948) 感谢！包关注的！
by LabmemNo_012LzTopic @ 2024-02-16 14:56:08