we have been given n x m grid and tile of size 2 x 1. We have to find out the no. of ways to place tiles in the grid.
(* I have solved the older version of this problem where grid size is 2 x m but in n x m, there are different cases arise)
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Maybe you can get an idea for solving the problem from this link.
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thanks ! looks like I am lazy in googling the stuff
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