{"image_url":null,"type":"rich","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","blog_url":"https://jeneshicc.hatenadiary.org/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjeneshicc.hatenadiary.org%2Fentry%2F20090107%2F1231334765\" title=\"Problem 169 - \u843d\u66f8\u304d\u3001\u6642\u3005\u843d\u5b66\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","description":"http://projecteuler.net/index.php?section=problems&id=169 2\u306e\u7d2f\u4e57\u304c\u51fa\u3066\u304d\u305f\u3089\u30012\u9032\u6570\u3067\u8003\u3048\u305f\u304f\u306a\u308b\u306e\u304c\u4eba\u60c5\u3002 \u5c11\u3057\u89b3\u5bdf\u3059\u308b\u3068\u30012\u304c\u4f1d\u64ad\u3057\u3066\u3044\u304f\u3001\u611f\u3058\u3002\u3064\u307e\u308a\u3001\u6700\u5f8c\u304c2\u304b\u3001\u305d\u3046\u3067\u306a\u3044\u304b\u3067\u72b6\u6cc1\u304c\u5909\u308f\u308b\u3002 \u3067\u3044\u308d\u3044\u308d\u3084\u3063\u305f\u7d50\u679c\u3001\u6700\u7d42\u7684\u306b\u6b21\u306e\u3088\u3046\u306b\u8003\u3048\u305f\u3002 n\u30921/2\u307e\u3067\u3064\u304b\u3063\u3066\u8868\u73fe\u3059\u308b\u3002 \u305d\u306e\u7d50\u679c\u3092\u4f7f\u3063\u30662*n,2*n+1\u30921/2\u307e\u3067\u4f7f\u3063\u3066\u8868\u73fe\u3057\u3066\u307f\u308b\u3002 \u3053\u308c\u3092\u9006\u5411\u304d\u306b\u884c\u3046\u3002 f 1 = (1,1) f n | even n = (z+t,t) | otherwise = (z,z+t) where (z,t) = f $ n `div` \u2026","author_name":"jeneshicc","height":"190","title":"Problem 169","published":"2009-01-07 22:26:05","blog_title":"\u843d\u66f8\u304d\u3001\u6642\u3005\u843d\u5b66","url":"https://jeneshicc.hatenadiary.org/entry/20090107/1231334765","author_url":"https://blog.hatena.ne.jp/jeneshicc/","categories":["Project Euler","Haskell"],"version":"1.0"}