leetcode-problemset/leetcode-cn/originData/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof.json

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            "questionId": "100305",
            "questionFrontendId": "剑指 Offer 36",
            "categoryTitle": "LCOF",
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            "title": "二叉搜索树与双向链表  LCOF",
            "titleSlug": "er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof",
            "content": "English description is not available for the problem. Please switch to Chinese.",
            "translatedTitle": "二叉搜索树与双向链表",
            "translatedContent": "<p>输入一棵二叉搜索树，将该二叉搜索树转换成一个排序的循环双向链表。要求不能创建任何新的节点，只能调整树中节点指针的指向。</p>\n\n<p>&nbsp;</p>\n\n<p>为了让您更好地理解问题，以下面的二叉搜索树为例：</p>\n\n<p>&nbsp;</p>\n\n<p><img src=\"https://assets.leetcode.com/uploads/2018/10/12/bstdlloriginalbst.png\"></p>\n\n<p>&nbsp;</p>\n\n<p>我们希望将这个二叉搜索树转化为双向循环链表。链表中的每个节点都有一个前驱和后继指针。对于双向循环链表，第一个节点的前驱是最后一个节点，最后一个节点的后继是第一个节点。</p>\n\n<p>下图展示了上面的二叉搜索树转化成的链表。&ldquo;head&rdquo; 表示指向链表中有最小元素的节点。</p>\n\n<p>&nbsp;</p>\n\n<p><img src=\"https://assets.leetcode.com/uploads/2018/10/12/bstdllreturndll.png\"></p>\n\n<p>&nbsp;</p>\n\n<p>特别地，我们希望可以就地完成转换操作。当转化完成以后，树中节点的左指针需要指向前驱，树中节点的右指针需要指向后继。还需要返回链表中的第一个节点的指针。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>注意：</strong>本题与主站 426 题相同：<a href=\"https://leetcode-cn.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/\">https://leetcode-cn.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/</a></p>\n\n<p><strong>注意：</strong>此题对比原题有改动。</p>\n",
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                    "name": "Stack",
                    "slug": "stack",
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                    "name": "Binary Tree",
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