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leetcode-problemset/leetcode-cn/problem (Chinese)/回文链表 [palindrome-linked-list-lcci].html
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<p>编写一个函数,检查输入的链表是否是回文的。</p>
<p>&nbsp;</p>
<p><strong>示例 1</strong></p>
<pre><strong>输入: </strong>1-&gt;2
<strong>输出:</strong> false
</pre>
<p><strong>示例 2</strong></p>
<pre><strong>输入: </strong>1-&gt;2-&gt;2-&gt;1
<strong>输出:</strong> true
</pre>
<p>&nbsp;</p>
<p><strong>进阶:</strong><br>
你能否用 O(n) 时间复杂度和 O(1) 空间复杂度解决此题?</p>