34289번 - Blaster the Daredevil 다국어

This year, Blaster wants to make a grand exit from graduation, and what better way to do so than by launching himself out of a cannon? Blaster's stunt can be modeled as a path in the XY-plane where the cannon is positioned at the origin, $(0, 0)$, and can be aimed at any angle.

Suspended in the air are $n$ floating hoops, each represented as a vertical segment. The $i$-th hoop is located $x_i$ meters along the X-axis. The bottom of the hoop is positioned $a_i$ meters above the X-axis, and the top of the hoop is positioned $b_i$ meters above the X-axis.

Blaster, modeled as a single point, will follow a perfectly straight-line trajectory after launch (since he has conveniently disabled Earth's gravity for this stunt). He is considered to pass through a hoop if his trajectory intersects or touches at least one point on the vertical line segment between $(x_i, a_i)$ and $(x_i, b_i)$.

Your task is to determine the maximum number of hoops Blaster can pass through if you carefully choose the cannon's launch angle.

The first line contains a single integer $n$ $(1 \leq n \leq 10^5)$ — the number of hoops.

Each of the next $n$ lines contains three integers $x_i, a_i, b_i$ $(1 \leq x_i \leq 10^9, 0 \leq a_i \leq b_i \leq 10^9)$, describing the position and height range of the $i$-th hoop.

It is guaranteed that perturbing the endpoints of hoops up or down by at most $10^{-6}$ meters will not affect the answer.

Print a single integer---the maximum number of hoops Blaster can pass through for an optimal choice of launch angle.