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leetcode-cn/problem (Chinese)/链表求和 [sum-lists-lcci].html Normal file
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<p>给定两个用链表表示的整数，每个节点包含一个数位。</p>
<p>这些数位是反向存放的，也就是个位排在链表首部。</p>
<p>编写函数对这两个整数求和，并用链表形式返回结果。</p>
<p>&nbsp;</p>
<p><strong>示例：</strong></p>
<pre><strong>输入：</strong>(7 -&gt; 1 -&gt; 6) + (5 -&gt; 9 -&gt; 2)，即617 + 295
<strong>输出：</strong>2 -&gt; 1 -&gt; 9，即912
</pre>
<p><strong>进阶：</strong>思考一下，假设这些数位是正向存放的，又该如何解决呢?</p>
<p><strong>示例：</strong></p>
<pre><strong>输入：</strong>(6 -&gt; 1 -&gt; 7) + (2 -&gt; 9 -&gt; 5)，即617 + 295
<strong>输出：</strong>9 -&gt; 1 -&gt; 2，即912
</pre>