？？？？？
by Lcm_simida @ 2024-03-05 20:10:07
@[lby_commandBlock](/user/791222) 取 $x=y=z=3N$ 不就行了吗。
by ScatteredHope @ 2024-03-05 20:18:05
跟[这题](https://mirror.codeforces.com/problemset/problem/743/C)好像
by INF_512 @ 2024-03-11 10:03:19