 steps to take when searching.</span>

   <span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">uintmax_t</span> <span class="identifier">maxit</span> <span class="special">=</span> <span class="number">50</span><span class="special">;</span>  <span class="comment">// Limit to maximum iterations.</span>
   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">uintmax_t</span> <span class="identif