图用一下题解的233333
这里:[pic=14829](https://cdn.luogu.com.cn/upload/pic/14829.png)
by Arcturus1350 @ 2018-02-25 10:39:15
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by YoungNeal @ 2018-02-25 10:46:30
已采纳。感谢您对洛谷的贡献!(此贴完结,请尽量不添加新回复)
by yyy2015c01 @ 2018-02-25 10:55:53