{"image_url":null,"title":"Project Euler 20","author_name":"noriok","width":"100%","provider_name":"Hatena Blog","description":"Problem 20 BigInteger \u3092\u4f7f\u3046\u65b9\u6cd5\u3068\u3001\u4f7f\u308f\u306a\u3044\u65b9\u6cd5\u306e 2 \u901a\u308a\u3067\u89e3\u3044\u3066\u307f\u305f\u3002 using System; using System.Collections.Generic; using System.Numerics; using System.Linq; class PE020 { // BigInteger \u3092\u4f7f\u3046\u65b9\u6cd5 static int Calc1() { BigInteger x = 1; for (int i = 2; i <= 100; i++) { x *= i; } int ans = 0; foreach (char c in x.ToString())\u2026","url":"https://noriok.hatenadiary.jp/entry/2014/05/31/155013","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnoriok.hatenadiary.jp%2Fentry%2F2014%2F05%2F31%2F155013\" title=\"Project Euler 20 - C#\u7df4\u7fd2\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/noriok/","blog_url":"https://noriok.hatenadiary.jp/","blog_title":"C#\u7df4\u7fd2\u65e5\u8a18","provider_url":"https://hatena.blog","version":"1.0","type":"rich","published":"2014-05-31 15:50:13","height":"190","categories":["C#","PE"]}