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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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  <description>数学。写した。 #include &lt;vector&gt; #include &lt;algorithm&gt; #include &lt;list&gt; using namespace std; class SmoothNumbersHard { public: int countSmoothNumbers(int n, int k) { vector&lt;int&gt; p(n+1,0); for(int i=2;i&lt;=n;i++) if(!p[i]) for(int j=i;j&lt;=n;j+=i) p[j]=i; int ans=0; for(int i=1;i&lt;=n;i++) if(p[i]&lt;=k) ans++; return…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2011-02-24 23:28:34</published>
  <title>SRM388 div2 hard</title>
  <type>rich</type>
  <url>https://a-kawashiro.hatenablog.com/entry/20110224/1298557714</url>
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