{"author_url":"https://blog.hatena.ne.jp/inamori/","url":"https://inamori.hateblo.jp/entry/20100308/p2","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100308%2Fp2\" title=\"Project Euler 75 - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Haskell"],"title":"Project Euler 75","provider_name":"Hatena Blog","height":"190","published":"2010-03-08 00:00:01","description":"http://projecteuler.net/index.php?section=problems&id=75 \u30d4\u30bf\u30b4\u30e9\u30b9\u306e\u6570\u306e\u751f\u6210\u5f0f\u3092\u4f7f\u3063\u3066\u5468\u56f2\u306e\u9577\u3055\u3092\u30ea\u30b9\u30c8\u306b\u3059\u308b\u3002\u4f8b\u3048\u307060\u307e\u3067\u306a\u3089\u3001 [12,24,36,48,60,30,60,40,56] \u3053\u308c\u3092Map\u306b\u5165\u308c\u3088\u3046\u3068\u3057\u305f\u304c\u3001\u30e1\u30e2\u30ea\u304c\u8db3\u308a\u306a\u3044\u3002 import qualified Data.Map as M import Data.List l = 15 * 10^5 perimeters = [ 2 * k * m * n | m <- [2..div l 6], n <- [m+1..min (m*2-1) (div l (2*m))]\u2026","provider_url":"https://hatena.blog","author_name":"inamori","blog_url":"https://inamori.hateblo.jp/","version":"1.0","type":"rich","image_url":null,"blog_title":"inamori\u2019s diary","width":"100%"}