{"version":"1.0","author_url":"https://blog.hatena.ne.jp/baitop/","title":"AtCoder Regular Contest 144 C - K Derangement","categories":["\u9806\u5217","ARC_\u30d1\u30ba\u30eb","\u8caa\u6b32"],"height":"190","blog_title":"\u30d0\u30a4\u30c8\u306e\u7af6\u30d7\u30ed\u30e1\u30e2","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbaitop.hatenadiary.jp%2Fentry%2F2022%2F07%2F17%2F183001\" title=\"AtCoder Regular Contest 144 C - K Derangement - \u30d0\u30a4\u30c8\u306e\u7af6\u30d7\u30ed\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/b/baitop/20220717/20220717171354.png","author_name":"baitop","published":"2022-07-17 18:30:01","provider_name":"Hatena Blog","width":"100%","url":"https://baitop.hatenadiary.jp/entry/2022/07/17/183001","provider_url":"https://hatena.blog","blog_url":"https://baitop.hatenadiary.jp/","description":"\u89e3\u3051\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u3053\u3046\u3044\u3046\u6d41\u308c\u3067\u89e3\u304d\u305f\u304b\u3063\u305f\u3068\u3044\u3046\u5984\u60f3\u3092\u66f8\u304d\u307e\u3059 C - K Derangement \u5206\u304b\u308a\u3084\u3059\u3055\u306e\u305f\u3081\u306b\u3001\u4ee5\u964di=0~N-1\u30670~N-1\u306e\u9806\u5217\u3092\u4e26\u3073\u66ff\u3048\u308b\u554f\u984c\u3068\u3057\u3066\u8003\u3048\u307e\u3059 \u89e3\u8aac \u554f\u984c\u6587\u3067\u554f\u308f\u308c\u3066\u3044\u308b\u306e\u306f\u8f9e\u66f8\u9806\u6700\u5c0f\u306a\u306e\u3067\u3001\u5148\u982d\u304b\u3089\u306a\u308b\u3079\u304f\u5c0f\u3055\u3044\u6570\u3092\u5165\u308c\u3066\u3044\u304d\u305f\u3044\u3067\u3059\u3002 \u4e0a\u306e\u30b0\u30e9\u30d5\u306f\u6a2a\u8ef8\u304ci\u306e\u5024\u3001\u7e26\u8ef8\u304cAi\u306e\u5024\u3067\u3001\u8d64\u7dda\u304c\u7406\u60f3\u306e\u914d\u7f6e\u3067\u3059 i=0~K-1\u306e\u6642\u306f Ai\u306bi+K\u4ee5\u4e0a\u306e\u5024\u3057\u304b\u4f7f\u3048\u306a\u3044\u305f\u3081\u3001Ai = i+k\u3068\u3059\u308b\u306e\u304c\u7406\u60f3\u3067 i=K~2K-1\u306e\u6642\u306fAi\u306bi-K\u3082\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u3067\u3001Ai = i-K\u3068\u3059\u308b\u306e\u304c\u7406\u60f3\u3067\u3059 i = 2K ~ N-1\u4ee5\u4e0a\u306e\u6642\u306f\u3001Ai\u3068\u3057\u3066\u4f7f\u3048\u308b\u5024\u30822\u2026"}