Can someone explain how to go through this problem http://www.codechef.com/problems/A6. I have found this solution but i can't understand its precomputation part. http://www.codechef.com/viewplaintext/2279326
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Thue-Morse sequence.
Let X be Thue-Morse sequence with length which is a power of 2 and greater than the pattern length. X' be flipped X.
All prefixes must lie in : X, XX', XX'X'X, XX'X'XX'XXX'
Next the problem can be solved using Z Algorithm