{"author_name":"wvogel00","blog_title":"wvogel\u65e5\u8a18","provider_name":"Hatena Blog","published":"2011-07-20 23:01:13","url":"https://wvogel00.hatenadiary.org/entry/20110720/1311170473","blog_url":"https://wvogel00.hatenadiary.org/","author_url":"https://blog.hatena.ne.jp/wvogel00/","width":"100%","type":"rich","image_url":null,"categories":["Haskell"],"version":"1.0","title":"Project Euler 340","provider_url":"https://hatena.blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwvogel00.hatenadiary.org%2Fentry%2F20110720%2F1311170473\" title=\"Project Euler 340 - wvogel\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"a = 50 b = 2000 c = 40 main = putStrLn s s :: String s = show.sum $ map f [0..b] f :: Integer -> Integer f n | n > b = n - c | n <= b = f (a+ f (a+ f (a+ f (a+n)))) \u8a66\u9a13\u52c9\u5f37\u3057\u3066\u305f\u3089Haskell\u89e6\u308a\u305f\u304f\u306a\u3063\u3066 340\u756a\u306e\u554f\u984c\u306b\u6311\u6226\uff01 \u3053\u308c\u306f\u4f8b\u984c\u3068\u3057\u3066\u8f09\u3063\u3066\u3044\u305f\u3082\u306e\u3002 \u52d5\u304b\u3057\u3066\u307f\u305f\u3089\u3061\u3083\u3093\u3068\u7b54\u3048\u304c\u3067\u307e\u3057\u305f \u3053\u3053\u3067\u3001 a = 7^21 b = 21^7 c = 12^7 \u3068\u3057\u3066 s\u3092\u8a08\u7b97\u3057\u3066\u3084\u308b\u3068\u30e1\u30e2\u30ea\u304c\u8db3\u308a\u305a\u306b\u8a08\u7b97\u3067\u304d\u305a......\u2026"}