数理文章

#include #include #include #include #include #include using namespace std; #define maxn 10000 struct point{ double x,y; point(){ x=y=0; } point(double x,double y){ this->x=x;this->y=y; } bo

struct point{ double x,y; point(){ x=y=0; } point(double x,double y){ this->x=x;this->y=y; } bool operator return y } }; typedef point vector; vector operator+(vector &a,vector &b){ ret