因为如果没个都满足不用准备的条件话那答案因是1不是0，无论如何第一根都要加工
by caoshurui @ 2022-11-04 13:34:03
@[syy1091906233](/user/675572)
by caoshurui @ 2022-11-04 13:34:35
[猜你想找](https://www.luogu.com.cn/problem/solution/P1233)
by Pandingding @ 2023-01-28 16:20:39
所以怎么可能是0呢？建议重看题面
by Joe2011 @ 2023-02-01 11:56:00