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"translatedContent": "<p>给定单链表的头节点 <code>head</code> ,请反转链表,并返回反转后的链表的头节点。</p>\n\n<div class=\"original__bRMd\">\n<div>\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg\" style=\"width: 302px; \" />\n<pre>\n<strong>输入:</strong>head = [1,2,3,4,5]\n<strong>输出:</strong>[5,4,3,2,1]\n</pre>\n\n<p><strong>示例 2</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/02/19/rev1ex2.jpg\" style=\"width: 102px;\" />\n<pre>\n<strong>输入:</strong>head = [1,2]\n<strong>输出:</strong>[2,1]\n</pre>\n\n<p><strong>示例 3</strong></p>\n\n<pre>\n<strong>输入:</strong>head = []\n<strong>输出:</strong>[]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li>链表中节点的数目范围是 <code>[0, 5000]</code></li>\n\t<li><code>-5000 &lt;= Node.val &lt;= 5000</code></li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>进阶:</strong>链表可以选用迭代或递归方式完成反转。你能否用两种方法解决这道题?</p>\n</div>\n</div>\n\n<p>&nbsp;</p>\n\n<p><meta charset=\"UTF-8\" />注意:本题与主站 206&nbsp;题相同:&nbsp;<a href=\"https://leetcode-cn.com/problems/reverse-linked-list/\">https://leetcode-cn.com/problems/reverse-linked-list/</a></p>\n",
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