@Bittu: For the first part, I'm assuming that you are asking for the number of paths from the upper left corner to the lower right corner. The robot will take 2*N moves in the process, of which N must be to the right and N must be down. Thus, the number of paths is the binomial coefficient (2*N) choose N = (2*N)! / (N!)^2.
Dave On Mar 1, 2:30 pm, bittu <[email protected]> wrote: > Imagine a robot sitting on the upper left hand corner of an NxN grid. > The robot can only move in two directions: right and down. How many > possible paths are there for the robot? > > FOLLOW UP > Imagine certain squares are “off limits”, such that the robot can not > step on them. Design an algorithm to get all possible paths for the > robot. > > Thanks & Regards > Shashank Mani -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
