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        "question": {
            "questionId": "1000341",
            "questionFrontendId": "剑指 Offer II 077",
            "categoryTitle": "LCOF2",
            "boundTopicId": 910335,
            "title": "链表排序",
            "titleSlug": "7WHec2",
            "content": "<p>English description is not available for the problem. Please switch to Chinese.</p>\n",
            "translatedTitle": "链表排序",
            "translatedContent": "<p>给定链表的头结点&nbsp;<code>head</code>&nbsp;，请将其按 <strong>升序</strong> 排列并返回 <strong>排序后的链表</strong> 。</p>\n\n<ul>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/14/sort_list_1.jpg\" style=\"width: 302px; \" /></p>\n\n<pre>\n<b>输入：</b>head = [4,2,1,3]\n<b>输出：</b>[1,2,3,4]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/14/sort_list_2.jpg\" style=\"width: 402px; \" /></p>\n\n<pre>\n<b>输入：</b>head = [-1,5,3,4,0]\n<b>输出：</b>[-1,0,3,4,5]\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<b>输入：</b>head = []\n<b>输出：</b>[]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><b>提示：</b></p>\n\n<ul>\n\t<li>链表中节点的数目在范围&nbsp;<code>[0, 5 * 10<sup>4</sup>]</code>&nbsp;内</li>\n\t<li><code>-10<sup>5</sup>&nbsp;&lt;= Node.val &lt;= 10<sup>5</sup></code></li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><b>进阶：</b>你可以在&nbsp;<code>O(n&nbsp;log&nbsp;n)</code> 时间复杂度和常数级空间复杂度下，对链表进行排序吗？</p>\n\n<p>&nbsp;</p>\n\n<p><meta charset=\"UTF-8\" />注意：本题与主站 148&nbsp;题相同：<a href=\"https://leetcode-cn.com/problems/sort-list/\">https://leetcode-cn.com/problems/sort-list/</a></p>\n",
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                    "code": "/**\n * Definition for singly-linked list.\n * struct ListNode {\n *     int val;\n *     ListNode *next;\n *     ListNode() : val(0), next(nullptr) {}\n *     ListNode(int x) : val(x), next(nullptr) {}\n *     ListNode(int x, ListNode *next) : val(x), next(next) {}\n * };\n */\nclass Solution {\npublic:\n    ListNode* sortList(ListNode* head) {\n\n    }\n};",
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                    "code": "/**\n * Definition for singly-linked list.\n * struct ListNode {\n *     int val;\n *     struct ListNode *next;\n * };\n */\n\n\nstruct ListNode* sortList(struct ListNode* head){\n\n}",
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                    "code": "/**\n * Definition for singly-linked list.\n * function ListNode(val, next) {\n *     this.val = (val===undefined ? 0 : val)\n *     this.next = (next===undefined ? null : next)\n * }\n */\n/**\n * @param {ListNode} head\n * @return {ListNode}\n */\nvar sortList = function(head) {\n\n};",
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                    "code": "# Definition for singly-linked list.\n# class ListNode\n#     attr_accessor :val, :next\n#     def initialize(val = 0, _next = nil)\n#         @val = val\n#         @next = _next\n#     end\n# end\n# @param {ListNode} head\n# @return {ListNode}\ndef sort_list(head)\n\nend",
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