标签：target ref tar href lan sub new org show
题面：https://www.luogu.org/problemnew/show/P2634#sub
题解：https://www.zybuluo.com/wsndy-xx/note/1141506
[Luogu] 聪聪可可
原文地址：https://www.cnblogs.com/shandongs1/p/9016702.html
