There are two kinds of people.
If person i is the first kind of people, it locates at position (pi, 0) initially, starts moving at time ti with a constant velocity of (0, v1), and then sees every person sits at the line segment (xi, yi), (xi + wi, yi), include the two points, where (xi, yi) is the position of person i at that time and wi is its vision.
If person i is the second kind of people, it locates at position (0, pi) initially, starts moving at time ti with a constant velocity of (v2, 0), and then sees every person sits at the line segment (xi, yi), (xi, yi + wi), include the two points, where (xi, yi) is the position of person i at that time and wi is its vision.
Now given the position of people, please calculate the number of distinct people every person has finally seen.