摘要：据说pkusc出了好几年半平面交了，我也来水一发 "ref" cpp include include include include using namespace std; int n, cnt, tot; const double eps=1e 7; struct Point{ double x 阅读全文

摘要：graham扫描法，参考 "yyb" cpp include include include include using namespace std; int n, din; const double eps=1e 7; struct Point{ double x, y; Point(double 阅读全文

摘要：狗题卡我精度…… "sol" cpp include include include include include include using namespace std; int n; struct Point{ double x, y; }pt[100005], O; double r; co 阅读全文