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Published on 12 Aug 2012 | over 4 years ago

This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA.

Given a NxN chess-board, place N queens on the chess board so that none of them attack each other.
Like a valid non attacking placement is
X Q X X
X X X Q
Q X X X
X X Q X


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