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NEED HELP


Hi, I am taking Descrete Math class, and my instructor gave me an 
assignment to find solution for the following question:

 How to get a permutation according to its lexicograghic order in O(n^2) or 
less using Lehmer Code ?

Any hints or ideas or  maybe WEB URL will be helpful and appreciated.
                                                      Thanks, in advance.

		
  	                                  



                                           Aleksandr Drel
                                           adrel at hejira.hunter.cuny.edu



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