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From: "Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>
Subject: Re: Generation of permutations
Date: Fri, 3 May 2002 09:04:38 -0400
Date: 2002-05-03T13:04:39+00:00	[thread overview]
Message-ID: <aau1t7$kq6$1@nh.pace.co.uk> (raw)
In-Reply-To: 3CD1664A.804F56BC@attbi.com

Yeah, but in effect that's just generating random permutations of the data
instead of ordered permutations. If you want to guarantee that you actually
end up with an answer, you have to do something with your PRNG that makes
sure it would generate all permutations, so, on average it would perform the
same as generating ordered permutations.

A better (slower) algorithm would be to generate a random set of machine
instructions, execute them, see if it sorted the list and quit when it does.
The problem, of course, is that you can't guarantee that it will ever
finish.

MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com


"Mark Biggar" <mark.a.biggar@attbi.com> wrote in message
news:3CD1664A.804F56BC@attbi.com...
>
> There are worse sorts then Bogosort.  For example there is 52-pickup
> sort: repeatedly randomize the list until you notice that it
> is sorted.
>






  reply	other threads:[~2002-05-03 13:04 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-04-29 11:54 Generation of permutations Reinert Korsnes
2002-04-30 13:52 ` Ted Dennison
2002-04-30 14:20   ` Marin David Condic
2002-05-02 12:32     ` Robert Dewar
2002-05-02 15:47     ` Ted Dennison
2002-05-02 16:16       ` Mark Biggar
2002-05-03 13:04         ` Marin David Condic [this message]
2002-05-05  0:52           ` Robert Dewar
2002-05-05 23:11             ` tmoran
2002-05-06  2:13               ` Chad R. Meiners
2002-05-06 13:52                 ` Stephen Leake
2002-05-09 17:44                   ` Darren New
2002-05-09 18:07                     ` Stephen Leake
2002-05-09 20:58                       ` Darren New
2002-05-09 23:21                         ` tmoran
2002-05-09 23:51                           ` Darren New
2002-05-10  3:37                             ` tmoran
2002-05-10  3:59                               ` Darren New
2002-05-10 13:13                               ` Robert Dewar
2002-05-25 16:21                         ` Robert I. Eachus
2002-05-09 23:24                       ` Robert Dewar
2002-05-09 23:48                       ` Robert Dewar
2002-05-10  3:37                         ` tmoran
2002-05-10 15:10                         ` Chad R. Meiners
2002-05-11  4:04                           ` Robert Dewar
2002-05-16  1:35                             ` Chad R. Meiners
2002-05-11  4:05                           ` Robert Dewar
2002-05-06 15:46                 ` Wes Groleau
2002-05-06 16:21                   ` Chad R. Meiners
2002-05-06 16:33                   ` Darren New
2002-05-07  0:06                     ` tmoran
2002-05-07  0:26                       ` Darren New
2002-05-07  1:56                         ` tmoran
2002-05-07 10:39                           ` Robert Dewar
2002-05-07 17:25                             ` Chad R. Meiners
2002-05-08  2:27                               ` Robert Dewar
2002-05-08  8:44                               ` Mats Karlssohn
2002-05-07 17:00                         ` Wes Groleau
2002-05-06 21:33               ` Robert Dewar
2002-05-06 17:26             ` Marin David Condic
2002-05-07  7:35             ` tmoran
2002-05-07 13:22               ` Marin David Condic
2002-05-08  5:23                 ` tmoran
2002-05-08 14:10                   ` Marin David Condic
2002-05-09 16:20                     ` Darren New
2002-05-09 19:04                     ` tmoran
2002-05-08 16:20                   ` Darren New
2002-05-08 17:31                     ` tmoran
2002-05-08 17:39                     ` Chad R. Meiners
2002-05-07 15:34               ` Darren New
2002-05-07 17:44               ` Chad R. Meiners
2002-05-07 19:58                 ` tmoran
2002-05-07 21:05                   ` Turing-undecidable languages (OT) Chad R. Meiners
2002-05-08  8:24                     ` Danx
2002-05-08 17:16                       ` Chad R. Meiners
2002-05-10  2:37                       ` Robert Dewar
2002-05-08  9:16                     ` Dmitry A. Kazakov
2002-05-08 17:18                       ` Chad R. Meiners
2002-05-09 20:56                         ` Dmitry A.Kazakov
2002-05-09 16:18                           ` Chad R. Meiners
2002-05-10  2:52                             ` Robert Dewar
2002-05-08  2:17               ` Generation of permutations Robert Dewar
2002-05-03 13:13         ` Ted Dennison
2002-05-03 13:24           ` Lutz Donnerhacke
2002-04-30 15:06   ` Hyman Rosen
2002-05-01  8:40     ` Adrian Hoe
2002-05-01 19:53       ` Hyman Rosen
2002-05-11  1:52     ` Steven Deller
2002-05-02 16:24   ` Mark Biggar
2002-04-30 17:12 ` Wes Groleau
2002-04-30 22:57   ` Robert Dewar
2002-05-01  0:54     ` tmoran
2002-05-01  9:42       ` Florian Weimer
2002-05-02 12:34         ` Robert Dewar
2002-05-01 12:43       ` Robert Dewar
2002-05-01 15:05         ` TO WHOM IT MAY CONCERN Wes Groleau
2002-05-02 12:27           ` More on copyright, (Re: TO WHOM IT MAY CONCERN) Robert Dewar
2002-05-08 13:56             ` Wes Groleau
2002-05-08 18:01               ` Robert Dewar
2002-05-08 18:31                 ` Hyman Rosen
2002-05-09 13:41                 ` Wes Groleau
2002-05-01 12:46       ` Generation of permutations Robert Dewar
2002-05-01 18:22         ` OT:Copyright, was " tmoran
2002-05-01 21:56           ` Robert Dewar
2002-05-01 23:45             ` tmoran
2002-05-02 11:58               ` Robert Dewar
2002-05-01 14:55     ` Wes Groleau
2002-05-02 12:41       ` Robert Dewar
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