f the input sites.  These points are on the
        boundary of the convex hull.   The first line is the number of
        extreme points.  Each point is listed, one per line.  The circle-in-square example
        has four extreme points.</dd>
    <dt>&nbsp;</dt>
    <dt>&nbsp;</dt>
    <dd><b>General</b></dd>
    <dt><a href="qh-optf.html#FA">FA</a></dt>
    <dd>compute total area for '<a href="qh-opto.html#s">s</a>'
        and '<a href="qh-optf.html#FS">FS</a>'</dd>
    <dt><a href="qh-opto.html#o">o</a>