The problem is stated below:
“A squad of robotic rovers are to be landed by NASA on a plateau on Mars.
This plateau, which is curiously rectangular, must be navigated by the
rovers so that their on-board cameras can get a complete view of the
surrounding terrain to send back to Earth.
A rover’s position and location is represented by a combination of x and y
co-ordinates and a letter representing one of the four cardinal compass
points. The plateau is divided up into a grid to simplify navigation. An
example position might be 0, 0, N, which means the rover is in the bottom
left corner and facing North.
In order to control a rover, NASA sends a simple string of letters. The
possible letters are ‘L’, ‘R’ and ‘M’. ‘L’ and ‘R’ makes the rover spin 90
degrees left or right respectively, without moving from its current spot.
‘M’ means move forward one grid point, and maintain the same heading.
Assume that the square directly North from (x, y) is (x, y+1).
The first line of input is the upper-right coordinates of the plateau, the
lower-left coordinates are assumed to be 0,0.
The rest of the input is information pertaining to the rovers that have
been deployed. Each rover has two lines of input. The first line gives the
rover’s position, and the second line is a series of instructions telling
the rover how to explore the plateau.
The position is made up of two integers and a letter separated by spaces,
corresponding to the x and y co-ordinates and the rover’s orientation.
Each rover will be finished sequentially, which means that the second rover
won’t start to move until the first one has finished moving.
The output for each rover should be its final co-ordinates and heading.
INPUT AND OUTPUT
1 2 N
3 3 E
1 3 N
5 1 E
The solution link: http://www.box.net/shared/av24fot8i5
The gist description: The source code is available in src folder.
JUnit test case is available inside test folder.
The JUnit testcases contain only test inputs given in the mail.
For inputs other than given input you can use the com.mars.rovers.Main class which takes the user inputs.