<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[sinat_27217449的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/sinat_27217449</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; sinat_27217449]]></copyright><item><title><![CDATA[三点顺序]]></title><link>https://blog.youkuaiyun.com/sinat_27217449/article/details/81142111</link><guid>https://blog.youkuaiyun.com/sinat_27217449/article/details/81142111</guid><author>sinat_27217449</author><pubDate>Sat, 21 Jul 2018 10:37:34 +0800</pubDate><description><![CDATA[三点顺序 
时间限制：1000 ms  |  内存限制：65535 KB 
难度：3

描述

现在给你不共线的三个点A,B,C的坐标，它们一定能组成一个三角形，现在让你判断A，B，C是顺时针给出的还是逆时针给出的？

如：

图1：顺时针给出

图2：逆时针给出 
     ![这里写图片描述](https://img-blog.youkuaiyun.com/20180721103515541?waterm...]]></description><category></category></item><item><title><![CDATA[acm-单词拼接]]></title><link>https://blog.youkuaiyun.com/sinat_27217449/article/details/81142048</link><guid>https://blog.youkuaiyun.com/sinat_27217449/article/details/81142048</guid><author>sinat_27217449</author><pubDate>Sat, 21 Jul 2018 10:32:36 +0800</pubDate><description><![CDATA[单词拼接 
时间限制：3000 ms  |  内存限制：65535 KB 
难度：5

描述

给你一些单词，请你判断能否把它们首尾串起来串成一串。

前一个单词的结尾应该与下一个单词的道字母相同。

如

aloha

dog

arachnid

gopher

tiger

rat



可以拼接成：aloha.arachnid.dog.gopher.rat.tiger


输入 
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参考文为: 
http://blog.sina.com.cn/s/blog_4b81125f0100fo95.html]]></description><category></category></item><item><title><![CDATA[蛇形填数]]></title><link>https://blog.youkuaiyun.com/sinat_27217449/article/details/77801909</link><guid>https://blog.youkuaiyun.com/sinat_27217449/article/details/77801909</guid><author>sinat_27217449</author><pubDate>Sat, 02 Sep 2017 16:13:20 +0800</pubDate><description><![CDATA[蛇形填数]]></description><category></category></item></channel></rss>