p">[</span><span class="n">j</span><span class="p">]</span>
        <span class="n">per</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lno</span> <span class="o">-</span> <span class="n">cur</span><span class="p">)</span>
        <span class="k">return</span> <span class="nb">max</span><span class="p">(</span><span class="n">per</span><span class="p">)</span></div>

    <span class="k">def</span> <span cl