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<pre class="literallayout"><span class="keyword">bool</span> <a name="id330866-bb"></a><span class="identifier">empty</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
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<td><p><span class="term">Returns:</span></p></td>
<td>
                        <code class="computeroutput">N==0</code>
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<td><p><span class="term">Throws:</span>