mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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168 lines
28 KiB
JSON
168 lines
28 KiB
JSON
{
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"questionId": "1040",
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"categoryTitle": "Algorithms",
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"boundTopicId": 3057,
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"title": "Maximum Binary Tree II",
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"titleSlug": "maximum-binary-tree-ii",
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"content": "<p>A <strong>maximum tree</strong> is a tree where every node has a value greater than any other value in its subtree.</p>\n\n<p>You are given the <code>root</code> of a maximum binary tree and an integer <code>val</code>.</p>\n\n<p>Just as in the <a href=\"https://leetcode.com/problems/maximum-binary-tree/\" target=\"_blank\">previous problem</a>, the given tree was constructed from a list <code>a</code> (<code>root = Construct(a)</code>) recursively with the following <code>Construct(a)</code> routine:</p>\n\n<ul>\n\t<li>If <code>a</code> is empty, return <code>null</code>.</li>\n\t<li>Otherwise, let <code>a[i]</code> be the largest element of <code>a</code>. Create a <code>root</code> node with the value <code>a[i]</code>.</li>\n\t<li>The left child of <code>root</code> will be <code>Construct([a[0], a[1], ..., a[i - 1]])</code>.</li>\n\t<li>The right child of <code>root</code> will be <code>Construct([a[i + 1], a[i + 2], ..., a[a.length - 1]])</code>.</li>\n\t<li>Return <code>root</code>.</li>\n</ul>\n\n<p>Note that we were not given <code>a</code> directly, only a root node <code>root = Construct(a)</code>.</p>\n\n<p>Suppose <code>b</code> is a copy of <code>a</code> with the value <code>val</code> appended to it. It is guaranteed that <code>b</code> has unique values.</p>\n\n<p>Return <code>Construct(b)</code>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/08/09/maxtree1.JPG\" style=\"width: 376px; height: 235px;\" />\n<pre>\n<strong>Input:</strong> root = [4,1,3,null,null,2], val = 5\n<strong>Output:</strong> [5,4,null,1,3,null,null,2]\n<strong>Explanation:</strong> a = [1,4,2,3], b = [1,4,2,3,5]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/08/09/maxtree21.JPG\" style=\"width: 358px; height: 156px;\" />\n<pre>\n<strong>Input:</strong> root = [5,2,4,null,1], val = 3\n<strong>Output:</strong> [5,2,4,null,1,null,3]\n<strong>Explanation:</strong> a = [2,1,5,4], b = [2,1,5,4,3]\n</pre>\n\n<p><strong>Example 3:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/08/09/maxtree3.JPG\" style=\"width: 404px; height: 180px;\" />\n<pre>\n<strong>Input:</strong> root = [5,2,3,null,1], val = 4\n<strong>Output:</strong> [5,2,4,null,1,3]\n<strong>Explanation:</strong> a = [2,1,5,3], b = [2,1,5,3,4]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The number of nodes in the tree is in the range <code>[1, 100]</code>.</li>\n\t<li><code>1 <= Node.val <= 100</code></li>\n\t<li>All the values of the tree are <strong>unique</strong>.</li>\n\t<li><code>1 <= val <= 100</code></li>\n</ul>\n",
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"translatedTitle": "最大二叉树 II",
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"translatedContent": "<p>最大树定义：一个树，其中每个节点的值都大于其子树中的任何其他值。</p>\n\n<p>给出最大树的根节点 <code>root</code>。</p>\n\n<p>就像<a href=\"https://leetcode-cn.com/problems/maximum-binary-tree/\">之前的问题</a>那样，给定的树是从列表 <code>A</code>（<code>root = Construct(A)</code>）递归地使用下述 <code>Construct(A)</code> 例程构造的：</p>\n\n<ul>\n\t<li>如果 <code>A</code> 为空，返回 <code>null</code></li>\n\t<li>否则，令 <code>A[i]</code> 作为 A 的最大元素。创建一个值为 <code>A[i]</code> 的根节点 <code>root</code></li>\n\t<li><code>root</code> 的左子树将被构建为 <code>Construct([A[0], A[1], ..., A[i-1]])</code></li>\n\t<li><code>root</code> 的右子树将被构建为 <code>Construct([A[i+1], A[i+2], ..., A[A.length - 1]])</code></li>\n\t<li>返回 <code>root</code></li>\n</ul>\n\n<p>请注意，我们没有直接给定 A，只有一个根节点 <code>root = Construct(A)</code>.</p>\n\n<p>假设 <code>B</code> 是 <code>A</code> 的副本，并在末尾附加值 <code>val</code>。题目数据保证 <code>B</code> 中的值是不同的。</p>\n\n<p>返回 <code>Construct(B)</code>。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<p><strong><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-1-1.png\" style=\"height: 160px; width: 159px;\" /><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-1-2.png\" style=\"height: 160px; width: 169px;\" /></strong></p>\n\n<pre>\n<strong>输入：</strong>root = [4,1,3,null,null,2], val = 5\n<strong>输出：</strong>[5,4,null,1,3,null,null,2]\n<strong>解释：</strong>A = [1,4,2,3], B = [1,4,2,3,5]\n</pre>\n\n<p><strong>示例 2：<br />\n<img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-2-1.png\" style=\"height: 160px; width: 180px;\" /><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-2-2.png\" style=\"height: 160px; width: 214px;\" /></strong></p>\n\n<pre>\n<strong>输入：</strong>root = [5,2,4,null,1], val = 3\n<strong>输出：</strong>[5,2,4,null,1,null,3]\n<strong>解释：</strong>A = [2,1,5,4], B = [2,1,5,4,3]\n</pre>\n\n<p><strong>示例 3：<br />\n<img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-3-1.png\" style=\"height: 160px; width: 180px;\" /><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/maximum-binary-tree-3-2.png\" style=\"height: 160px; width: 201px;\" /></strong></p>\n\n<pre>\n<strong>输入：</strong>root = [5,2,3,null,1], val = 4\n<strong>输出：</strong>[5,2,4,null,1,3]\n<strong>解释：</strong>A = [2,1,5,3], B = [2,1,5,3,4]\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= B.length <= 100</code></li>\n</ul>\n\n<p> </p>\n\n<p> </p>\n",
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"code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n * int val;\n * TreeNode *left;\n * TreeNode *right;\n * TreeNode() : val(0), left(nullptr), right(nullptr) {}\n * TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}\n * TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}\n * };\n */\nclass Solution {\npublic:\n TreeNode* insertIntoMaxTree(TreeNode* root, int val) {\n\n }\n};",
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