<h2>217. Contains Duplicate</h2><h3>Easy</h3><hr><div><p>Given an integer array <code>nums</code>, return <code>true</code> if any value appears <strong>at least twice</strong> in the array, and return <code>false</code> if every element is distinct.</p>

<p>&nbsp;</p>

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

<pre><strong>Input:</strong> nums = [1,2,3,1]

<strong>Output:</strong> true

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

<pre><strong>Input:</strong> nums = [1,2,3,4]

<strong>Output:</strong> false

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

<pre><strong>Input:</strong> nums = [1,1,1,3,3,4,3,2,4,2]

<strong>Output:</strong> true

</pre>

<p>&nbsp;</p>

<p><strong>Constraints:</strong></p>

<ul>

<li><code>1 &lt;= nums.length &lt;= 10⁵</code></li>

<li><code>-10⁹ &lt;= nums[i] &lt;= 10⁹</code></li>

</ul>

</div>