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+<h2><a href="https://leetcode.com/problems/add-two-numbers-ii">445. Add Two Numbers II</a></h2><h3>Medium</h3><hr><p>You are given two <strong>non-empty</strong> linked lists representing two non-negative integers. The most significant digit comes first and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list.</p>
+
+<p>You may assume the two numbers do not contain any leading zero, except the number 0 itself.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+<img alt="" src="https://assets.leetcode.com/uploads/2021/04/09/sumii-linked-list.jpg" style="width: 523px; height: 342px;" />
+<pre>
+<strong>Input:</strong> l1 = [7,2,4,3], l2 = [5,6,4]
+<strong>Output:</strong> [7,8,0,7]
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> l1 = [2,4,3], l2 = [5,6,4]
+<strong>Output:</strong> [8,0,7]
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> l1 = [0], l2 = [0]
+<strong>Output:</strong> [0]
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li>The number of nodes in each linked list is in the range <code>[1, 100]</code>.</li>
+	<li><code>0 &lt;= Node.val &lt;= 9</code></li>
+	<li>It is guaranteed that the list represents a number that does not have leading zeros.</li>
+</ul>
+
+<p>&nbsp;</p>
+<p><strong>Follow up:</strong>&nbsp;Could you solve it without reversing the input lists?</p>