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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>差を保存するところまでは思いついたのに、残念。 #include &lt;cstring&gt; #include &lt;vector&gt; #define TOWER_MAX 250000 using namespace std; class EqualTowers { public: int n; vector&lt;int&gt; bricks; int cache[TOWER_MAX+1][50]; int rec(int dif,int k) { if((k==n &amp;&amp; dif!=0) || TOWER_MAX&lt;dif) return -(1&lt;&lt;28); if(k==n &amp;&amp; dif==0) return 0; i…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2011-04-05 18:58:06</published>
  <title>SRM442 div2 hard</title>
  <type>rich</type>
  <url>https://a-kawashiro.hatenablog.com/entry/20110405/1301997486</url>
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