@[FrenkiedeJong21](/user/203968) [这题样例什么意思](https://www.luogu.com.cn/problem/P5317)
by Hexarhy @ 2020-02-19 11:28:25
@[Hilarious_Reality](/user/80049) ？？？
by e1c2 @ 2020-02-19 11:29:08
来自2202年的同求
by creation_hy @ 2022-11-13 20:48:48