A828.Robot Instructions--Silver
提高+/省选-
通过率:0%
时间限制:1.00s
内存限制:128MB
题目描述
Bessie is learning how to control a robot she has recently received as a gift.
The robot begins at point (0,0) on the coordinate plane and Bessie wants
the robot to end at point (xg,yg). Bessie initially has a list of N
(1≤N≤40) instructions to give to the robot, the i-th of which will
move the robot xi units right and yi units up (or left or down when
xi and yi 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 (xg,yg).
Note: the time and memory limits for this problem are 4s and 512MB, twice
the defaults.
输入格式
The first line contains N. The next line contains xg and yg, each in
the range −109…109. The final N lines describe the instructions.
Each line has two integers xi and yi, also in the range −109…109.
It is guaranteed that (xg,yg)=(0,0) and (xi,yi)=(0,0) for all
i.
输出格式
Print N lines, the number of ways Bessie can select K instructions from
the original N for each K from 1 to N.
输入输出样例
输入#1
7 5 10 -2 0 3 0 4 0 5 0 0 10 0 -10 0 10
输出#1
0 2 0 3 0 1 0
说明/提示
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)