<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<oembed>
  <author_name>tanakaBox</author_name>
  <author_url>https://blog.hatena.ne.jp/tanakaBox/</author_url>
  <blog_title>ボクノス</blog_title>
  <blog_url>https://boxnos.hatenablog.com/</blog_url>
  <categories>
    <anon>Scheme</anon>
  </categories>
  <description>簡単！Problem 16 - PukiWiki 2^15 = 32768 であり、これの各数字の合計は 3 + 2 + 7 + 6 + 8 = 26 となる。同様にして、2^1000 の各数字の合計を求めよ。 はいはい。 (define (digit-&gt;integer c) (if (char-numeric? c) (- (char-&gt;integer c) (char-&gt;integer #\0)) #f)) (fold (lambda (c acc) (+ (digit-&gt;integer c) acc)) 0 (string-&gt;list (number-&gt;string (expt 2 10…</description>
  <height>190</height>
  <html>&lt;iframe src=&quot;https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080404%2F1207262095&quot; title=&quot; Problem 16 - 2の1000乗 - ボクノス&quot; class=&quot;embed-card embed-blogcard&quot; scrolling=&quot;no&quot; frameborder=&quot;0&quot; style=&quot;display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;&quot;&gt;&lt;/iframe&gt;</html>
  <image_url></image_url>
  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2008-04-04 07:34:55</published>
  <title> Problem 16 - 2の1000乗</title>
  <type>rich</type>
  <url>https://boxnos.hatenablog.com/entry/20080404/1207262095</url>
  <version>1.0</version>
  <width>100%</width>
</oembed>
