{"title":"AOJ1056 Ben Toh","width":"100%","type":"rich","url":"https://nanikaka.hatenadiary.org/entry/20120430/1335746061","image_url":null,"published":"2012-04-30 09:34:21","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnanikaka.hatenadiary.org%2Fentry%2F20120430%2F1335746061\" title=\"AOJ1056 Ben Toh - nanikaka\u306eAOJ\u822a\u6d77\u65e5\u8a8c\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://nanikaka.hatenadiary.org/","version":"1.0","author_url":"https://blog.hatena.ne.jp/nanikaka/","blog_title":"nanikaka\u306eAOJ\u822a\u6d77\u65e5\u8a8c","author_name":"nanikaka","provider_name":"Hatena Blog","categories":["AOJ Volume10"],"description":"\u554f\u984c\u30ea\u30f3\u30af Ben Toh \u89e3\u6cd5 DP\u3067\u3059\u3002 dp[ n ]: n\u65e5\u9593\u306b\u5f97\u3089\u308c\u308b\u5f01\u5f53\u306e\u500b\u6570\u306e\u671f\u5f85\u5024 \u306e\u8868\u3092\u57cb\u3081\u3066\u89e3\u304d\u307e\u3059\u3002 n\u65e5\u9593\u306e\u671f\u9593\u304c\u3042\u308a\u3001\u521d\u65e5\u304b\u3089\u9023\u7d9a\u3057\u3066k\u65e5\u9593\u5f01\u5f53\u3092\u7372\u5f97\u3067\u304d\u3066\u3044\u308b\u5834\u5408\u3092\u8003\u3048\u307e\u3059\u3001\u307e\u305f\u3053\u306e\u72b6\u614b\u306b\u306a\u308b\u78ba\u7387\u3092p\u3001\u6b21\u306e\u5f01\u5f53\u7372\u5f97\u78ba\u7387\u3092win\u3068\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3001p*(1-win)\u306e\u78ba\u7387\u3067\u5f01\u5f53\u7372\u5f97\u306b\u5931\u6557\u3057\u307e\u3059\u3002\u305d\u3057\u3066k+2\u65e5\u76ee\u304b\u3089\u306f\u6b8b\u308a\u65e5\u6570n-k-1\u306e\u5834\u5408\u3068\u5168\u304f\u540c\u3058\u72b6\u614b\u9077\u79fb\u56f3\u3068\u306a\u308b\u306e\u3067dp[n-k-1]\u306e\u7d50\u679c\u304c\u4f7f\u3048\u307e\u3059\u3002\u3064\u307e\u308a dp[ n ] += p*(1-win) * (k + dp[max{0, n-k-1}]) \u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306ek\u30921\u301cn\u307e\u3067\u7d9a\u3051\u3001\u6700\u5f8c\u306b\u3001\u9023\u7d9an\u65e5\u9593\u5f01\u5f53\u3092\u7372\u5f97\u3057\u2026","provider_url":"https://hatena.blog"}