an><span class="n">where</span><span class="p">)</span>
        <span class="n">E</span> <span class="o">=</span> <span class="n">union_treap</span><span
            class="p">(</span><span class="n">R</span><span class="p">,</span> <span class="n">L</span><span
            class="p">)</span>
        <span class="k">return</span> <span class="n">E</span></div>

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