## USACO 2022 February Contest, Silver

## Problem 2. Robot Instructions

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The robot begins at point $(0, 0)$ on the coordinate plane and Bessie wants the robot to end at point $(x_g, y_g)$. Bessie initially has a list of $N$ ($1\le N\le 40$) instructions to give to the robot, the $i$-th of which will move the robot $x_i$ units right and $y_i$ units up (or left or down when $x_i$ and $y_i$ are negative, respectively).

For each $K$ from $1$ to $N$, help Bessie count the number of ways she can select $K$ instructions from the original $N$ such that after the $K$ instructions are executed, the robot will end at point $(x_g, y_g)$.

****Note: the time and memory limits for this problem are 4s and 512MB, twice
the defaults.****

#### INPUT FORMAT (input arrives from the terminal / stdin):

The first line contains $N$. The next line contains $x_g$ and $y_g$, each in the range $-10^9 \ldots 10^9$. The final $N$ lines describe the instructions. Each line has two integers $x_i$ and $y_i$, also in the range $-10^9 \ldots 10^9$.It is guaranteed that $(x_g,y_g)\neq (0,0)$ and $(x_i,y_i)\neq (0,0)$ for all $i$.

#### OUTPUT FORMAT (print output to the terminal / stdout):

Print $N$ lines, the number of ways Bessie can select $K$ instructions from the original $N$ for each $K$ from $1$ to $N$.#### SAMPLE INPUT:

7 5 10 -2 0 3 0 4 0 5 0 0 10 0 -10 0 10

#### SAMPLE OUTPUT:

0 2 0 3 0 1 0

In this example, there are six ways Bessie can select the instructions:

(-2,0) (3,0) (4,0) (0,10) (0,-10) (0,10) (1 2 3 5 6 7) (-2,0) (3,0) (4,0) (0,10) (1 2 3 5) (-2,0) (3,0) (4,0) (0,10) (1 2 3 7) (5,0) (0,10) (0,-10) (0,10) (4 5 6 7) (5,0) (0,10) (4 5) (5,0) (0,10) (4 7)

For the first way, the robot's path looks as follows:

(0,0) -> (-2,0) -> (1,0) -> (5,0) -> (5,10) -> (5,0) -> (5,10)

#### SCORING:

- Test cases 2-4 satisfy $N\le 20$.
- Test cases 5-16 satisfy no additional constraints.

Problem credits: Alex Liang