扩展卢卡斯？
by impuk @ 2020-08-04 13:00:33
@[一只爬行者](/user/279700) 好的蟹蟹！
by pikabi @ 2020-08-04 13:01:38
@[一只爬行者](/user/279700) 捕捉蒟蒻
by impuk @ 2020-08-04 13:01:46
exLucas
by rui_er @ 2020-08-04 13:02:46
https://www.luogu.com.cn/problem/P4720
by Gemini7X @ 2020-08-04 13:04:51
@[rui_er](/user/122461) @[Flying_Bird](/user/328405) thanks！
by pikabi @ 2020-08-04 13:15:32