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Date: -- (:)
From: Alan Post <apost@r...>
Subject: [Caml-list] Re: how to calculate a "xor"
In article <20031205200829.7e29a2c6.Damien.Pous@ens-lyon.fr>, Damien wrote:
> 
> Given two sets A and B, I want to calculate A\B _and_ B\A.  The sets
> are represented by lists.
> 
> without using an order to sort the lists, is there something better
> than the following (O(n^2)) ?

If you have a decent hashing function, you can get expected linear
time by putting the elements into hash tables.

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