Simple algorithm question - how to reorder a sequence economically

[Carlos Nepomuceno]

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> Date: Fri, 24 May 2013 17:28:07 -0700
> Subject: Re: Simple algorithm question - how to reorder a sequence economically
> From: peter.h.m.brooks at gmail.com
> To: python-list at python.org
[...]
> If the scenario could be modelled mathematically, then there'd be no
> point in writing the simulation.

I don't know what you mean. A computer simulation is an instance of a mathematical model.