Rules are based on Codurance description (https://katalyst.codurance.com/mars-rover)
You have to move a rover on a grid (10x10 by default). The rover have a starting position and face to a direction (North, East, South, West). It understands three commands:
- turn right
- turn left
- move forward
If the rover reach grid limits, it wraps around the end of the grid.
Given a rover starting from (0,0) and facing North.
Input MR gives 0:1:E
With the same rover and with an obstacle on (0,1).
Input MR gives O:0:0:N we get the last possible position and facing.