6 f (Point basePt, Point pt1, Point pt2)
11 (long long) (pt1.p_x - basePt.p_x) * (long long) (pt2.p_y - basePt.p_y) -
12 (long long) (pt1.p_y - basePt.p_y) * (long long) (pt2.p_x - basePt.p_x);
14 if (vector > (long long) 0)
16 else if (vector < (long long) 0)
36 answer = f (b, p1, p2);