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  <blog_title>はまやんはまやんはまやん</blog_title>
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    <anon>競技プログラミング</anon>
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  <description>http://codeforces.com/contest/988/problem/DN個の配列Xがある この配列の以下の条件を満たす部分列を答えよ 任意の2つの要素の大きさの差が2の累乗 その中で部分列の大きさが最大</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2018-06-02 11:14:18</published>
  <title>Points and Powers of Two [Codeforces Round #486 D]</title>
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