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  <author_name>rokugats</author_name>
  <author_url>https://blog.hatena.ne.jp/rokugats/</author_url>
  <blog_title>ICPC log</blog_title>
  <blog_url>https://rokugats-pc.hateblo.jp/</blog_url>
  <categories>
    <anon>凸包</anon>
    <anon>POJ</anon>
    <anon>計算幾何</anon>
    <anon>蟻本</anon>
    <anon>ライブラリ借用</anon>
  </categories>
  <description>蟻本の例題。凸包。Spaghetti Sourceのccwライブラリを拝借。変数tの必要性がよく分かってない。 #include&lt;cstdio&gt; #include&lt;complex&gt; #include&lt;vector&gt; #include&lt;algorithm&gt; #define MAX_N 50005 using namespace std; /* Spaghetti Source 引用 http://www.prefield.com/algorithm/geometry/geometry.html http://www.prefield.com/algorithm/geometry/ccw.html…</description>
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  <image_url></image_url>
  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2014-02-25 02:55:09</published>
  <title>PKU POJ 2187 Beauty Contest</title>
  <type>rich</type>
  <url>https://rokugats-pc.hateblo.jp/entry/2014/02/25/025509</url>
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