开long long一样过不去（~~这个数据范围咋可能是爆int，我病急乱投医了属于是~~
by AMIRIOX無暝 @ 2021-10-31 16:02:02
过了。
题面有问题，[讨论区](https://www.luogu.com.cn/discuss/367064?page=1)
by AMIRIOX無暝 @ 2021-10-31 16:27:59