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Author: monishasuthapalli

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+<h2>15. 3Sum</h2><h3>Medium</h3><hr><div><p>Given an integer array nums, return all the triplets <code>[nums[i], nums[j], nums[k]]</code> such that <code>i != j</code>, <code>i != k</code>, and <code>j != k</code>, and <code>nums[i] + nums[j] + nums[k] == 0</code>.</p>
+
+<p>Notice that the solution set must not contain duplicate triplets.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+<pre><strong>Input:</strong> nums = [-1,0,1,2,-1,-4]
+<strong>Output:</strong> [[-1,-1,2],[-1,0,1]]
+</pre><p><strong>Example 2:</strong></p>
+<pre><strong>Input:</strong> nums = []
+<strong>Output:</strong> []
+</pre><p><strong>Example 3:</strong></p>
+<pre><strong>Input:</strong> nums = [0]
+<strong>Output:</strong> []
+</pre>
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>0 &lt;= nums.length &lt;= 3000</code></li>
+	<li><code>-10<sup>5</sup> &lt;= nums[i] &lt;= 10<sup>5</sup></code></li>
+</ul>
+</div>