{"blog_title":"koba-e964\u306e\u65e5\u8a18","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkoba-e964.hatenablog.com%2Fentry%2F2020%2F09%2F21%2F110149\" title=\"Codeforces Round #669 (Div. 2) D. Discrete Centrifugal Jumps - koba-e964\u306e\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>","blog_url":"https://koba-e964.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/koba-e964/","type":"rich","title":"Codeforces Round #669 (Div. 2) D. Discrete Centrifugal Jumps","provider_name":"Hatena Blog","description":"\u8003\u5bdf\u30fb\u5b9f\u88c5\u5408\u8a08\u3067 2 \u6642\u9593\u304b\u304b\u3063\u305f\u4e0a\u306b\u3001\u7121\u99c4\u306a\u5b9f\u88c5\u3092\u3057\u3066\u3057\u307e\u3063\u305f\u3002 Problem - D - Codeforces \u554f\u984c \u9577\u3055 n \u306e\u6570\u5217 h \u304c\u4e0e\u3048\u3089\u308c\u308b\u30021 \u756a\u76ee\u306e\u8981\u7d20\u304b\u3089 n \u756a\u76ee\u306e\u8981\u7d20\u307e\u3067\u96e2\u6563\u7684\u30b8\u30e3\u30f3\u30d7\u3060\u3051\u3092\u4f7f\u3063\u3066\u79fb\u52d5\u3057\u305f\u3044\u3002i \u96e2\u6563\u7684\u3067\u3042\u308b\u3068\u306f\u3001max(h[i+1], ..., h[j-1]) max(h[i], h[j]) \u304c\u6210\u7acb\u3059\u308b\u3053\u3068\u3092\u3044\u3046\u3002\u96e2\u6563\u7684\u30b8\u30e3\u30f3\u30d7\u306e\u6700\u5c0f\u56de\u6570\u3092\u6c42\u3081\u3088\u3002\u5236\u7d04 2 1 \u89e3\u6cd5 \u611a\u76f4\u306a O(N^2) DP (dp[i] := i \u304b\u3089 n \u307e\u3067\u306e\u6700\u77ed\u624b\u6570) \u3092\u8003\u3048\u308b\u3002i \u304b\u3089 j \u3078\u30b8\u30e3\u30f3\u30d7\u3067\u304d\u308b\u306e\u306f j \u304c i+1 \u304b\u3089\u8caa\u6b32\u306b\u53d6\u3063\u305f\u5358\u8abf\u5897\u52a0\u5217\u304b\u5358\u8abf\u6e1b\u5c11\u5217\u306b\u542b\u2026","image_url":null,"author_name":"koba-e964","published":"2020-09-21 11:01:49","url":"https://koba-e964.hatenablog.com/entry/2020/09/21/110149","version":"1.0","categories":[],"height":"190","width":"100%"}