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How can I improve my Algorithm?

This is a problem from Interview Street in Dynamic Programming section. https://www.interviewstreet.com/challenges/dashboard/#problem/4f2c2e3780aeb Billboards(20 points) ADZEN is a very ...
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How to do Fairy Chess problem in O(N^3)?

https://www.interviewstreet.com/challenges/dashboard/#problem/4f1c88e0dec8a Fairy Chess (35 Points) You have a $N \times N$ chess board. An $S$-leaper is a chess piece which can move from ...