已AC，此帖终
by fqEason @ 2023-01-20 17:54:36
@[fqEason](/user/723171) %%%hyx爆切蓝题
by chang_an_1029 @ 2023-01-20 19:17:28
<~f[pos][now]>,new train of thought
by chang_an_1029 @ 2023-01-20 19:19:45