d">while</span> <span class="special">(</span><span class="identifier">m</span><span class="special">--)</span>
      <span class="special">++</span><span class="identifier">r</span><span class="special">;</span>
  <span class="keyword">else</span>
    <span class="keyword">while</span> <span class="special">(</span><span class="identifier">m</span><span class="special">++)</span>
      <span class="special">--</span><span class="identifier">r</span><span class="special">;</span>
  <span class="keyword">ret