{"image_url":null,"width":"100%","type":"rich","categories":["F#"],"blog_title":"inamori\u2019s diary","blog_url":"https://inamori.hateblo.jp/","description":"http://projecteuler.net/index.php?section=problems&id=30 \u91cd\u8907\u7d44\u5408\u305b\u3092\u81ea\u4f5c\u3057\u307e\u3057\u305f\uff0815 + 25 + 25 = 25 + 15 + 25\u3060\u304b\u3089\uff09\u3002yield\u3092\u4f7f\u3046\u3068\u7c21\u5358\u3067\u3059\u306d\u3002 let rec repeated_combination a n = seq { if n = 0 then yield [] else if a <> [] then for b in repeated_combination a (n - 1) do yield (List.head a) :: b for b in repeated_combination\u2026","height":"190","provider_url":"https://hatena.blog","version":"1.0","author_url":"https://blog.hatena.ne.jp/inamori/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100512%2Fp1\" title=\"Project Euler 30 - 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>","url":"https://inamori.hateblo.jp/entry/20100512/p1","published":"2010-05-12 00:00:00","provider_name":"Hatena Blog","title":"Project Euler 30","author_name":"inamori"}