Usage: <tt>input = <i>pn</i> finalcnfile = <i>fname</i> writepath</tt>

<p>
Write the path into file.
There are three paths in the MD++/ising model: <tt>pathA</tt>, <tt>pathB</tt>, <tt>pathC</tt>.
Which one gets written depends on the value of <tt><i>pn</i></tt>
(1 for <tt>pathA</tt>, 2 for <tt>pathB</tt>, 3 for <tt>pathC</tt>).

<p>
Also see <tt>readpath</tt>.
