{"description":"http://projecteuler.net/index.php?section=problems&id=143 \u2220BTC = \u2220CTA = \u2220ATB = 120\u00b0\u3088\u308a\u3001 a2 = q2 + qr + r2 b2 = p2 + pq + q2 c2 = r2 + rp + p2 \u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002\u500b\u3005\u306e\u6574\u6570\u89e3\u306f\u30d4\u30bf\u30b4\u30e9\u30b9\u6570\u3068\u540c\u3058\u3088\u3046\u306b\u6c42\u3081\u3089\u308c\u307e\u3059\u3002 x = q / a y = r / a \u3068\u7f6e\u304d\u63db\u3048\u3066\u3001 x2 + x y + y2 = 1 \u30b0\u30e9\u30d5\u3092\u63cf\u304f\u3068\u3001\u659c\u3081\u306b\u306a\u3063\u305f\u6955\u5186\u3067\u3059\u3002(0, 1)\u3092\u5fc5\u305a\u901a\u308b\u306e\u3067\u3001\u3053\u306e\u70b9\u304b\u3089\u7b2c1\u8c61\u9650\u3067\u518d\u3073\u6955\u5186\u3068\u4ea4\u308f\u308b\u3088\u3046\u306b\u76f4\u7dda\u3092\u5f15\u304d\u307e\u3059\u3002 y = -k x + 1 \u305d\u306e\u2026","version":"1.0","blog_url":"https://inamori.hateblo.jp/","author_url":"https://blog.hatena.ne.jp/inamori/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100803%2Fp1\" title=\"Project Euler 143 - 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>","title":"Project Euler 143","provider_name":"Hatena Blog","blog_title":"inamori\u2019s diary","published":"2010-08-03 00:00:00","height":"190","width":"100%","provider_url":"https://hatena.blog","categories":["PE","\u6570\u5b66","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/i/inamori/20100801/20100801085002.png","type":"rich","url":"https://inamori.hateblo.jp/entry/20100803/p1","author_name":"inamori"}