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206-reverse-linked-list/README.md

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+<h2><a href="https://leetcode.com/problems/reverse-linked-list/">206. Reverse Linked List</a></h2><h3>Easy</h3><hr><div><p>Given the <code>head</code> of a singly linked list, reverse the list, and return <em>the reversed list</em>.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+<img alt="" src="https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg" style="width: 542px; height: 222px;">
+<pre><strong>Input:</strong> head = [1,2,3,4,5]
+<strong>Output:</strong> [5,4,3,2,1]
+</pre>
+
+<p><strong>Example 2:</strong></p>
+<img alt="" src="https://assets.leetcode.com/uploads/2021/02/19/rev1ex2.jpg" style="width: 182px; height: 222px;">
+<pre><strong>Input:</strong> head = [1,2]
+<strong>Output:</strong> [2,1]
+</pre>
+
+<p><strong>Example 3:</strong></p>
+
+<pre><strong>Input:</strong> head = []
+<strong>Output:</strong> []
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li>The number of nodes in the list is the range <code>[0, 5000]</code>.</li>
+	<li><code>-5000 &lt;= Node.val &lt;= 5000</code></li>
+</ul>
+
+<p>&nbsp;</p>
+<p><strong>Follow up:</strong> A linked list can be reversed either iteratively or recursively. Could you implement both?</p>
+</div>