{"version":"1.0","title":"Problem 6","categories":["F#","Project Euler"],"blog_url":"https://regerege.hatenadiary.org/","provider_url":"https://hatena.blog","blog_title":"regerege \u30e1\u30e2\u5e33","height":"190","description":"Problem 6 module Problem_0006 (* \u3010\u554f\u984c\u3011 \u6700\u521d\u306e10\u500b\u306e\u81ea\u7136\u6570\u306b\u3064\u3044\u3066\u3001\u305d\u306e\u548c\u306e\u4e8c\u4e57\u3068\u3001\u4e8c\u4e57\u6570\u306e\u548c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002 1&#178; + 2&#178; + ... + 10&#178; = 385 (1 + 2 + ... + 10)&#178; = 3025 \u3053\u308c\u3089\u306e\u6570\u306e\u5dee\u306f 3025 - 385 = 2640 \u3068\u306a\u308b\u3002 \u540c\u69d8\u306b\u3057\u3066\u3001\u6700\u521d\u306e100\u500b\u306e\u81ea\u7136\u6570\u306b\u3064\u3044\u3066\u548c\u306e\u4e8c\u4e57\u3068\u4e8c\u4e57\u306e\u548c\u306e\u5dee\u3092\u6c42\u3081\u3088\u3002 A. 25164150 *) // 46 ms // \u6570\u5b66\u306e\u516c\u5f0f\u3092\u4f7f\u7528 let sigma k = (k * (k+1)) / 2 let sigma2 k = (k\u2026","type":"rich","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fregerege.hatenadiary.org%2Fentry%2F20111112%2F1321097514\" title=\"Problem 6 - regerege \u30e1\u30e2\u5e33\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","image_url":null,"author_url":"https://blog.hatena.ne.jp/regerege/","author_name":"regerege","url":"https://regerege.hatenadiary.org/entry/20111112/1321097514","published":"2011-11-12 20:31:54"}