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  <blog_title>らむだ畑でつかまえて (catcher in the λ)</blog_title>
  <blog_url>https://itto100pen.hatenadiary.org/</blog_url>
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  <description>第3回PFDS(Purely Functional Data Structures)読書会で exercise 3.9 のときに紹介された論文「Constructing Red-Black Trees」（この名前でググるとPDF版が見つかる。Postscript版はこちら）に載っている関数 bottom-up の計算量が O(n) であることを確認する。コードは data Color = R | B data RBTree a = E | N Color (RBTree a) a (RBTree a) data Digit a = One a (RBTree a) | Two a (RBTre…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2012-01-20 22:07:34</published>
  <title>Purely Functional Data Structures exercise 3.9 （Red-Black Tree 赤黒木）</title>
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  <url>https://itto100pen.hatenadiary.org/entry/20120120/1327064854</url>
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