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  <author_name>a_kawashiro</author_name>
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  <blog_title>a_kawashiroのブログ</blog_title>
  <blog_url>https://a-kawashiro.hatenablog.com/</blog_url>
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    <anon>topcoder</anon>
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  <description>方針が間違ってて何度もTLEした。 cache[すでに使ったフェンス(bit)]でメモれば一発。 #include &lt;cmath&gt; #include &lt;vector&gt; #include &lt;algorithm&gt; using namespace std; class GrasslandFencer { public: vector&lt;int&gt; fences; double cache[(1&lt;&lt;16)]; int n; double heron(int _a,int _b,int _c) { int d[3]; d[0]=_a,d[1]=_b,d[2]=_c; sort(d,d+3); if(d[0]…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2011-03-14 22:36:03</published>
  <title>SRM314 div2 hard</title>
  <type>rich</type>
  <url>https://a-kawashiro.hatenablog.com/entry/20110314/1300109763</url>
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