摘要: #include <bits/stdc++.h> using namespace std; const long double eps=1e-8; const double pi=acos(-1.0); int sgn(double x) { if(fabs(x)<eps) return 0; re 阅读全文
posted @ 2019-09-27 20:55 勿忘安己 阅读(400) 评论(0) 推荐(0) 编辑