@[Sci_8633](/user/1081521) 有负数呢。
by Eirin_Yagokoro @ 2024-03-15 20:40:43
乘积可能会 $<-2^{31}$，所以不能 unsigned
by jqQt0220 @ 2024-03-15 20:40:48
原来如此
by Sci_8633 @ 2024-03-15 20:41:28
@[Sci_8633](/user/1081521) hack:
```
-1 1145141919810
```
by Eirin_Yagokoro @ 2024-03-15 20:42:14