{"blog_url":"https://n9d.hatenadiary.org/","author_name":"n9d","image_url":null,"title":"problem39","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/n9d/","categories":[],"provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fn9d.hatenadiary.org%2Fentry%2F20110925%2Fp2\" title=\"problem39 - \u8a08\u7b97\u6a5f\u3068\u622f\u308c\u308b\u65e5\u3005\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://n9d.hatenadiary.org/entry/20110925/p2","height":"190","width":"100%","published":"2011-09-25 00:00:01","blog_title":"\u8a08\u7b97\u6a5f\u3068\u622f\u308c\u308b\u65e5\u3005","type":"rich","version":"1.0","description":"\u307e\u3042\u3001\u305d\u306e\u307e\u307e\u3002 sortBy\u306a\u308amaximumBy\u306a\u308a\u304cData.Ord\u306ecomparing\u3092\u4f7f\u308f\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u306e\u304cruby\u3068\u6bd4\u8f03\u3057\u3066\u9762\u5012 import Data.List import Data.Ord main = print $ p p = maximumBy (comparing length) $ group $ sort [x+y+z|x<-[1..998],y<-[x..998-x],z<-[y..998-x-y],x<=y,y<z,z^2==x^2+y^2]"}