题目中说
```
输入数据不保证各不相同。
```
by Dr_殇 @ 2018-10-31 20:21:02
@[Rorshach](/space/show?uid=59303)
by Dr_殇 @ 2018-10-31 20:21:10
@[Shan_Xian](/space/show?uid=28182) 哎呀我眼瞎了…… 抱歉
by Rorshach @ 2018-10-31 20:34:46