n-repeated-element-in-size-2n-array.md

<p>In a array <code>A</code> of size <code>2N</code>, there are <code>N+1</code> unique elements, and exactly one of these elements is repeated N times.</p>

<p>Return the element repeated <code>N</code> times.</p>

<p>&nbsp;</p>

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<p><strong>Example 1:</strong></p>

<pre>
<strong>Input: </strong><span id="example-input-1-1">[1,2,3,3]</span>
<strong>Output: </strong><span id="example-output-1">3</span>
</pre>

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<p><strong>Example 2:</strong></p>

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<strong>Input: </strong><span id="example-input-2-1">[2,1,2,5,3,2]</span>
<strong>Output: </strong><span id="example-output-2">2</span>
</pre>

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<p><strong>Example 3:</strong></p>

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<strong>Input: </strong><span id="example-input-3-1">[5,1,5,2,5,3,5,4]</span>
<strong>Output: </strong><span id="example-output-3">5</span>
</pre>

<p>&nbsp;</p>

<p><strong>Note:</strong></p>

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	<li><code>4 &lt;= A.length &lt;= 10000</code></li>
	<li><code>0 &lt;= A[i] &lt; 10000</code></li>
	<li><code>A.length</code> is even</li>
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