应该是您的搜索写挂了，您这么写 $vis_n$ 永远等于 $0$
by goodier @ 2024-01-21 18:52:47
$dfs$ 里改成 $x==n+1$ 应该就没事了
by goodier @ 2024-01-21 18:53:18
@[goodier](/user/242039) 所以说，我加sort过了是因为数据出水了？
by zk_y @ 2024-01-21 21:07:07
@[goodier](/user/242039) 谢谢您的答复，关注了
by zk_y @ 2024-01-21 21:07:35
@[zhangkeyuan0623](/user/792089) 应该是吧 互关了q
by goodier @ 2024-01-22 12:38:03