{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkino.hateblo.jp%2Fentry%2F2013%2F02%2F24%2F012031\" title=\"make10 - \u8df3\u616e\u8dcb\u8003\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","author_name":"quinoh","categories":["\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","Haskell"],"width":"100%","provider_name":"Hatena Blog","title":"make10","blog_url":"https://kino.hateblo.jp/","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/quinoh/","height":"190","url":"https://kino.hateblo.jp/entry/2013/02/24/012031","blog_title":"\u8df3\u616e\u8dcb\u8003","image_url":null,"type":"rich","published":"2013-02-24 01:20:31","description":"\u300c8 8 9 9\u300d\u306emake10\u3092\u56db\u5247\u6f14\u7b97\u3067\u3084\u308c\u3068\u8a00\u3046\u8a71\u306a\u306e\u3067\u3002\u5206\u304b\u3093\u306a\u3044\u306e\u3067\u3002 \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u3057\u3066\u306f\u300c\u5207\u7b26\u306e\u756a\u53f7\u306710\u3092\u4f5c\u308b\u300d\u306e\u3068\u540c\u3058\u3067\u3059\u3002\u30ab\u30c3\u30b3\u3088\u304f\u8a00\u3046\u3068\u5206\u5272\u7d71\u6cbb\u6cd5\u3002\u30b3\u30fc\u30c9\u306f\u3042\u3093\u307e\u7f8e\u3057\u304f\u306a\u3044\u3051\u3069\u3002 import Data.List data Expr = C Int | Add Expr Expr | Sub Expr Expr | Mul Expr Expr | Div Expr Expr instance Show Expr where show (C x) = show x show (Add x y) = \"(\" ++ (show x) ++ \"+\" ++ (show y) ++ \u2026"}