{"description":"\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u306e\u51fa\u529b\u3092\u7df4\u7fd2\u3067\u304d\u308b\u554f\u984c\u3067\u3059\u306d \u554f\u984c\u3078\u306e\u30ea\u30f3\u30af \u554f\u984c\u6982\u8981 \u534a\u5f84 \u306e\u5186\u306e\u5186\u5468\u306e\u9577\u3055\u3092\u6c42\u3081\u3088\u3002 \u8003\u3048\u305f\u3053\u3068 \u3092\u51fa\u529b\u3059\u308c\u3070 OK\u3002 \u306b\u3064\u3044\u3066\u306f\u3001\u4e00\u3064\u306e\u65b9\u6cd5\u3068\u3057\u3066 double PI = acos(-1.0); \u3068\u3059\u308b\u306e\u3092\u3088\u304f\u3084\u308b\uff01 \u307e\u305f\u3001\u5c0f\u6570\u70b9 10 \u6841\u307e\u3067\u51fa\u529b\u3059\u308b\u3068\u304b\u306f cout << fixed << setprecision(10) << res << endl; \u3068\u304b\u306b\u3059\u308c\u3070 OK\u3002 \u30b3\u30fc\u30c9 (C++) #include <bits/stdc++.h> using namespace std; const double PI = acos(-1.0); int main() { d\u2026","blog_title":"\u3051\u3093\u3061\u3087\u3093\u306e\u7af6\u30d7\u30ed\u7cbe\u9032\u8a18\u9332","author_name":"drken1215","provider_name":"Hatena Blog","image_url":"https://cdn.user.blog.st-hatena.com/default_entry_og_image/80936665/1687765056723440","width":"100%","version":"1.0","title":"AtCoder ABC 163 A - Circle Pond (9Q, \u7070\u8272, 100 \u70b9)","author_url":"https://blog.hatena.ne.jp/drken1215/","height":"190","categories":["AtCoder","AtCoder100\u70b9","\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u3092\u6271\u3046\u554f\u984c","1\u500b\u306e\u6574\u6570\u306e\u5165\u529b\u3092\u6271\u3046\u6613\u3057\u3044\u554f\u984c","\u6613\u3057\u3044\u6a19\u6e96\u5165\u51fa\u529b\u554f\u984c","ABC-A","\u7070\u8272diff","\u6570\u5b66(\u56f3\u5f62\u554f\u984c)","\u8a08\u7b97\u5e7e\u4f55","\u7b97\u6570\u3068\u6570\u5b66","\u6613\u3057\u3044\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u3092\u6271\u3046\u554f\u984c","\u6613\u3057\u3044\u7b97\u6570\u3068\u6570\u5b66","\u6613\u3057\u3044\u56f3\u5f62\u554f\u984c","NoviSteps9Q"],"url":"https://drken1215.hatenablog.com/entry/2020/04/20/154000","blog_url":"https://drken1215.hatenablog.com/","type":"rich","provider_url":"https://hatena.blog","published":"2020-04-20 15:40:00","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdrken1215.hatenablog.com%2Fentry%2F2020%2F04%2F20%2F154000\" title=\"AtCoder ABC 163 A - Circle Pond (9Q, \u7070\u8272, 100 \u70b9) - \u3051\u3093\u3061\u3087\u3093\u306e\u7af6\u30d7\u30ed\u7cbe\u9032\u8a18\u9332\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}