<code class="computeroutput">first</code></span></p></td>
<td><p>first element in the input range </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last</code></span></p></td>
<td><p>last element in the input range </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">op</code></span></p></td>
<td><p>binary operator used to check for uniqueness </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">queue</code></span></p></td>
<td><p>comma