#include <iostream>
#include <fstream>
using namespace std;

/*********************************************
 ** PROTOTYPES & STRUCT DEFINITIONS
 *********************************************/
struct point
{
  double x, y;
};
void read(point &p, istream &IN);
void write(point p, ostream &OUT);
point operator+(point a, point b);
point operator/(point P, double z);
ostream& operator<<(ostream& OUT, point p);
istream& operator>>(istream& IN, point &p);