{"type":"rich","blog_url":"https://inamori.hateblo.jp/","image_url":null,"version":"1.0","height":"190","width":"100%","author_url":"https://blog.hatena.ne.jp/inamori/","description":"\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30aa\u30a4\u30e9\u30fc http://projecteuler.net/ Q223. \u4e09\u89d2\u5f62\u306e\u8fbaa\u2264b\u2264c\u304c\u3001a2 + b2 = c2 + 1\u3092\u6e80\u305f\u3059\u3068\u304d\u3001\u304e\u308a\u304e\u308a\u92ed\u89d2\u4e09\u89d2\u5f62\u3068\u547c\u3076\u3002\u5468\u304c2500\u4e07\u4ee5\u4e0b\u306e\u304e\u308a\u304e\u308a\u92ed\u89d2\u4e09\u89d2\u5f62\u306f\u3044\u304f\u3064\u3042\u308b\u304b\u3002 \u7279\u306b\u5de5\u592b\u3082\u306a\u3044\u3002a\u306b\u3064\u3044\u3066\u30a8\u30e9\u30c8\u30b9\u30c6\u30cd\u30b9\u306e\u3075\u308b\u3044\u7684\u306b\u7d20\u56e0\u6570\u5206\u89e3\u3059\u308b\u3002\u305d\u3057\u3066\u3001(a - 1)(a + 1)\u306e\u7d04\u6570\u3092\u3059\u3079\u3066\u51fa\u3059\u3002\u305d\u3057\u3066\u6761\u4ef6\u3092\u6e80\u305f\u3059\u3082\u306e\u3092\u6570\u3048\u3066\u3044\u304f\u3002\u305f\u3060\u3057\u3001\u30e1\u30e2\u30ea\u304c\u53b3\u3057\u3044\u306e\u3067\u3001\u7d20\u56e0\u6570\u5206\u89e3\u306f\u3001\u7d20\u6570\u3068\u6307\u6570\u3067\u4e00\u3064\u306e\u6574\u6570\u3068\u3057\u3066\u683c\u7d0d\u3057\u305f\u3002\u307e\u305f\u3001(a - 1)(a + 1)\u304c\u5076\u6570\u30fb\u5947\u6570\u3067\u5206\u3051\u3066\u3001\u5225\u3005\u306b\u8a08\u7b97\u3057\u305f\u3002\u305d\u308c\u3067\u3082\u8db3\u308a\u306a\u3044\u306e\u3067\u3001\u7d50\u5c40C++\u3067\u7d44\u307f\u306a\u304a\u3057\u305f\u3002","provider_name":"Hatena Blog","categories":["\u6570\u5b66","Python","C++"],"url":"https://inamori.hateblo.jp/entry/20090716/p1","blog_title":"inamori\u2019s diary","author_name":"inamori","published":"2009-07-16 00:00:01","title":"Project Euler 223","provider_url":"https://hatena.blog","html":""}