struct point{
	double x, y;
	point(double _x=0, double _y=0){
		x = _x;
		y = _y;
	}
	void read(){
		scanf("%lf %lf", &x, &y);
	}
	point operator +(point q){ return point(x+q.x, y+q.y); }
	point operator -(point q){ return point(x-q.x, y-q.y); }
	point operator *(double t){ return point(x*t, y*t); }
	point operator /(double t){ return point(x/t, y/t); }

	friend ostream& operator <<(ostream& o, point p) {
		return o << "(" << p.x << ", " << p.y << ")";
	}
};