/p>

<p>We recommend the helper functions <code class="language-c++ highlighter-rouge"><span class="n">partition</span></code> and <code class="language-c++ highlighter-rouge"><span class="n">concatenate</span></code> for <code class="language-c++ highlighter-rouge"><span class="n">quickSort</span></code>.</p>

<ul>
  <li>The <code class="language-c++ highlighter-rouge"><span class="n">partition</span></code> helper divides an input list into three lists: less, equal, and greater
    <ul>
      <li>Start by