| Fiber |
|Time Limit: 1000ms, Special Time Limit:2500ms, Memory Limit:65536KB |
| Total submit users: 37, Accepted users: 27 |
| Problem 10869 :
No special judgement
| Today, here's a interesting problem.
Nowadays , optical fiber(光纤)
is widely used in our life. Fiber Transmission (光纤传输)
is the method to send optical information (光信息)in
a special pipe, as the figure shows.
The light goes into the pipe at the left end of the pipe,
then after some times direct reflection, goes out the pipe at the right end
, to send optical message.
Here's the problem, when the light goes into the pipe in
a given direction ,which direction will it be when it goes out the pipe.
| The input contains several test cases. The first line of
the input is a single integer T which is the number of test cases. T test
cases follow. (T <= 100)
Each test case start with two positive integers D , L ,
which indicate the diameter of pile and the length of the pipe.(that is to
say the pipe is between Y = D , Y = 0,X = 0,and X = L).next lines follow
three integers, h, Vx, Vy. represents the position and direction in which
the light goes into the pipe, the position is (0,h) and the direction is
vector (Vx, Vy). All numbers in the input is in the range of int32.(D>= h>=
0,D > 0,L > 0,Vx > 0,Vy != 0.we ensure that the light can goes into the pipe
in the given direction and position.)
| Output two integers Vx2 , Vy2 represent the direction
vector in which the light goes out the pipe. because of the various way to
present that direction, we need you make Abs(Vx) == Abs(Vx2). |
2 1 -1
2 1 -1
1 1 -1