From: skaller <skaller@users.sourceforge.net>
To: Seth Fogarty <sfogarty@gmail.com>
Cc: caml-list@pauillac.inria.fr
Subject: Re: [Caml-list] Re: Set and Map question
Date: 20 Sep 2004 13:56:10 +1000 [thread overview]
Message-ID: <1095652570.2580.298.camel@pelican.wigram> (raw)
In-Reply-To: <c7ee6112040919201417b7328@mail.gmail.com>
On Mon, 2004-09-20 at 13:14, Seth Fogarty wrote:
> What I MEANT to ask is: Is there a O(n) method of set/map construction
> from a list, as opposed to the O(n log n) fold method.
It seems to me that in general that is impossible,
since random tree insertions are at least O(log n)
in the tree size (proportional to depth).
Perhaps you meant, assuming the list is sorted?
In that case, in theory you could precalculate
the shape of the tree just from the size, and then
fill in the elements in O(n).
--
John Skaller, mailto:skaller@users.sf.net
voice: 061-2-9660-0850,
snail: PO BOX 401 Glebe NSW 2037 Australia
Checkout the Felix programming language http://felix.sf.net
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next prev parent reply other threads:[~2004-09-20 3:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-20 2:37 [Caml-list] " Seth Fogarty
2004-09-20 3:14 ` [Caml-list] " Seth Fogarty
2004-09-20 3:56 ` skaller [this message]
2004-09-20 4:18 ` Seth Fogarty
2004-09-20 6:43 ` skaller
2004-09-20 8:32 ` Diego Olivier Fernandez Pons
2004-09-20 4:02 ` Brian Hurt
2004-09-20 8:17 ` Richard Jones
2004-09-20 12:41 ` Igor Pechtchanski
2004-09-20 12:54 ` Jean-Christophe Filliatre
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