{"author_name":"obelisk2","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fobelisk.hatenablog.com%2Fentry%2F2018%2F08%2F20%2F225639\" title=\"\u4ea4\u5dee\u305b\u305a\u306b\u4e00\u7b46\u66f8\u304d\uff08Ruby\uff09 - Camera Obscura\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u4ea4\u5dee\u305b\u305a\u306b\u4e00\u7b46\u66f8\u304d\uff08Ruby\uff09","width":"100%","provider_name":"Hatena Blog","type":"rich","blog_url":"https://obelisk.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/obelisk2/","categories":["Ruby","\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u30fb\u30d1\u30ba\u30eb"],"version":"1.0","provider_url":"https://hatena.blog","url":"https://obelisk.hatenablog.com/entry/2018/08/20/225639","height":"190","published":"2018-08-20 22:56:39","blog_title":"Camera Obscura","description":"\u554f\u984c\uff1a \u9577\u65b9\u5f62\u72b6\u306b\u6a2a 5 \u500b\u3001\u7e26 4 \u500b\u306e\u683c\u5b50\u70b9\u304c\u5168\u90e8\u3067 20\u500b\u3001\u7b49\u9593\u9694\u306b\u4e26\u3093\u3067\u3044\u307e\u3059\u3002\u3053\u306e\u3059\u3079\u3066\u306e\u683c\u5b50\u70b9\u3092\u4e00\u7b46\u66f8\u304d\uff08\u4ea4\u5dee\u3057\u3066\u306f\u306a\u3089\u306a\u3044\uff09\u3067\u8fbf\u308b\u3068\u3059\u308b\u3068\u3001\u305d\u306e\u8fbf\u308a\u65b9\u306f\u5168\u90e8\u3067\u4f55\u3068\u304a\u308a\u3042\u308b\u3067\u3057\u3087\u3046\u304b\u3002 \u305f\u3060\u3057\u9032\u3080\u65b9\u5411\u306f\u4e0a\u4e0b\u5de6\u53f3\u306e\u307f\u3067\u3001\u307e\u305f\u59cb\u70b9\u3068\u7d42\u70b9\u304c\u53cd\u5bfe\u306b\u306a\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u540c\u3058\u30d1\u30bf\u30fc\u30f3\u306f\u9664\u5916\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059\u3002 Ruby \u3067\u89e3\u3044\u3066\u307f\u307e\u3059\u3002 q62.rb m, n = 5, 4 count = 0 solve = ->(x, y, history) { if history.size == m * n count += 1 else [[1, 0], [-1, 0], [0, 1], [0, -1]].\u2026","image_url":"https://images-fe.ssl-images-amazon.com/images/I/51UODCJtLqL._SL160_.jpg"}