{"width":"100%","author_url":"https://blog.hatena.ne.jp/misora192/","published":"2021-08-09 22:24:57","image_url":null,"version":"1.0","type":"rich","url":"https://mini-notes.hatenablog.com/entry/2021/08/09/222457","height":"190","categories":[],"provider_name":"Hatena Blog","blog_url":"https://mini-notes.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmini-notes.hatenablog.com%2Fentry%2F2021%2F08%2F09%2F222457\" title=\"ABC212 E - Safety Journey - mini notes\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"mini notes","author_name":"misora192","provider_url":"https://hatena.blog","description":"\u554f\u984c\uff1aE - Safety Journey \u89e3\u7b54\uff1aSubmission #24919698 - AtCoder Beginner Contest 212 \u89e3\u6cd5\uff1aDP\u3002 dp[i][j]\uff1ai\u65e5\u76ee\u306b\u90fd\u5e02j\u306b\u3044\u308b\u3068\u304d\u306e\u5834\u5408\u306e\u6570\u3068\u3059\u308b\u3002\u7b54\u3048\u306fdp[K][0]\u3067\u3042\u308b\u3002 E\u3092\u4f7f\u3048\u308b\u9053\u306e\u96c6\u5408\u3068\u3059\u308b\u3002 dp[i][j] = \u03a3dp[i-1][k] ( (k, j) in E) = \u03a3dp[i-1][k] (all k) - \u03a3dp[i-1][k] ( (k, j) NOT in E) \u3053\u3053\u3067\u3001\u300call k\u300d\u306f\u5404j\u9593\u3067\u4f7f\u3044\u307e\u308f\u3057\u53ef\u80fd\u3001\u300c(k, j) NOT in E\u300d\u306f\u554f\u984c\u3067\u4e0e\u3048\u3089\u308c\u308b\u8fba\u306e\u96c6\u5408\u3067\u5168\u3066\u306ej\u3092\u8a08\u7b97\u3057\u2026","title":"ABC212 E - Safety Journey"}