btree</span><span class="p">[</span><span class="n">item</span><span class="p">]</span> <span class="o">=</span> <span class="n">subUtil</span> <span class="o">-</span> <span class="n">temp</span>
                    <span class="k">else</span><span class="p">:</span>
                        <span class="n">subtree</span><span class="p">[</span><span class="n">item</span><span class="p">]</span> <span class="o">+=</span> <span class="n">subUtil</span> <span class="o">-</span> <span class="n">temp</span>
   