捞*2，悬赏两关注！

Eason2009 @ 2022-07-17 07:52:34

by zhaoyp @ 2022-07-17 08:29:49

49行，len/2要加括号。

by zhaoyp @ 2022-07-17 08:30:25

@Eason2009

by Eason2009 @ 2022-07-17 08:32:16

@zhaoyp 已经AC啦，但还是谢谢！