{"width":"100%","provider_name":"Hatena Blog","image_url":null,"author_url":"https://blog.hatena.ne.jp/inamori/","height":"190","author_name":"inamori","url":"https://inamori.hateblo.jp/entry/20090803/p1","description":"\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30aa\u30a4\u30e9\u30fc http://projecteuler.net/ Q243. \u5206\u6bcd\u3092d\u3068\u3059\u308b0\u3088\u308a\u5927\u304d\u304f1\u3088\u308a\u5c0f\u3055\u3044\u5206\u6570\u306e\u3046\u3061\u3001\u65e2\u7d04\u306e\u3082\u306e\u306e\u5272\u5408\u3092R(d)\u3067\u8868\u3059\u3002R(d) < 15499 / 94744\u3092\u6e80\u305f\u3059\u6700\u3082\u5c0f\u3055\u3044d\u3092\u6c42\u3081\u3088\u3002 \u3053\u308c\u306f\u3084\u3055\u3057\u3044\u3002 d\u306f\u306a\u308b\u3079\u304f\u591a\u304f\u306e\u7d20\u6570\u3092\u4f7f\u3063\u305f\u307b\u3046\u304c\u3001R(d)\u304c\u5c0f\u3055\u304f\u306a\u308b\u304b\u3089\u30012\u304b\u3089\u9806\u306b\u7d20\u6570\u3092\u304b\u3051\u3066\u3044\u3051\u3070\u3088\u3044\u3002\u305d\u3053\u3067p/q = 1/2*2/3*4/5*...\u304c\u554f\u984c\u306e\u5206\u6570\u3088\u308a\u5c0f\u3055\u304f\u306a\u3063\u305f\u3089\u3001p*k/(q*k-1)\u304c\u554f\u984c\u306e\u5206\u6570\u3088\u308a\u5c0f\u3055\u304f\u306a\u308b\u6700\u3082\u5c0f\u3055\u3044k\u3092\u6c42\u3081\u308c\u3070\u3088\u3044\u3002","blog_title":"inamori\u2019s diary","version":"1.0","published":"2009-08-03 00:00:00","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20090803%2Fp1\" title=\"Project Euler 243 - 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":["\u6570\u5b66","Python"],"type":"rich","title":"Project Euler 243","blog_url":"https://inamori.hateblo.jp/"}