mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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196 lines
32 KiB
JSON
196 lines
32 KiB
JSON
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"questionId": "3509",
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"boundTopicId": 2947390,
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"title": "K-th Largest Perfect Subtree Size in Binary Tree",
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"content": "<p>You are given the <code>root</code> of a <strong>binary tree</strong> and an integer <code>k</code>.</p>\n\n<p>Return an integer denoting the size of the <code>k<sup>th</sup></code> <strong>largest<em> </em>perfect binary</strong><em> </em><span data-keyword=\"subtree\">subtree</span>, or <code>-1</code> if it doesn't exist.</p>\n\n<p>A <strong>perfect binary tree</strong> is a tree where all leaves are on the same level, and every parent has two children.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">root = [5,3,6,5,2,5,7,1,8,null,null,6,8], k = 2</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmpresl95rp-1.png\" style=\"width: 400px; height: 173px;\" /></p>\n\n<p>The roots of the perfect binary subtrees are highlighted in black. Their sizes, in non-increasing order are <code>[3, 3, 1, 1, 1, 1, 1, 1]</code>.<br />\nThe <code>2<sup>nd</sup></code> largest size is 3.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">root = [1,2,3,4,5,6,7], k = 1</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">7</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmp_s508x9e-1.png\" style=\"width: 300px; height: 189px;\" /></p>\n\n<p>The sizes of the perfect binary subtrees in non-increasing order are <code>[7, 3, 3, 1, 1, 1, 1]</code>. The size of the largest perfect binary subtree is 7.</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">root = [1,2,3,null,4], k = 3</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">-1</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmp74xnmpj4-1.png\" style=\"width: 250px; height: 225px;\" /></p>\n\n<p>The sizes of the perfect binary subtrees in non-increasing order are <code>[1, 1]</code>. There are fewer than 3 perfect binary subtrees.</p>\n</div>\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, 2000]</code>.</li>\n\t<li><code>1 <= Node.val <= 2000</code></li>\n\t<li><code>1 <= k <= 1024</code></li>\n</ul>\n",
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"translatedTitle": "第 K 大的完美二叉子树的大小",
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"translatedContent": "<p>给你一棵 <strong>二叉树 </strong>的根节点 <code>root</code> 和一个整数<code>k</code>。</p>\n\n<p>返回第 <code>k</code> 大的 <strong>完美二叉</strong><span data-keyword=\"subtree\"><strong>子树</strong> </span>的大小，如果不存在则返回 <code>-1</code>。</p>\n\n<p><strong>完美二叉树 </strong>是指所有叶子节点都在同一层级的树，且每个父节点恰有两个子节点。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong> <span class=\"example-io\">root = [5,3,6,5,2,5,7,1,8,null,null,6,8], k = 2</span></p>\n\n<p><strong>输出：</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmpresl95rp-1.png\" style=\"width: 400px; height: 173px;\" /></p>\n\n<p>完美二叉子树的根节点在图中以黑色突出显示。它们的大小按非递增顺序排列为 <code>[3, 3, 1, 1, 1, 1, 1, 1]</code>。<br />\n第 <code>2</code> 大的完美二叉子树的大小是 3。</p>\n</div>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong> <span class=\"example-io\">root = [1,2,3,4,5,6,7], k = 1</span></p>\n\n<p><strong>输出：</strong> <span class=\"example-io\">7</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmp_s508x9e-1.png\" style=\"width: 300px; height: 189px;\" /></p>\n\n<p>完美二叉子树的大小按非递增顺序排列为 <code>[7, 3, 3, 1, 1, 1, 1]</code>。最大的完美二叉子树的大小是 7。</p>\n</div>\n\n<p><strong class=\"example\">示例 3：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong> <span class=\"example-io\">root = [1,2,3,null,4], k = 3</span></p>\n\n<p><strong>输出：</strong> <span class=\"example-io\">-1</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/10/14/tmp74xnmpj4-1.png\" style=\"width: 250px; height: 225px;\" /></p>\n\n<p>完美二叉子树的大小按非递增顺序排列为 <code>[1, 1]</code>。完美二叉子树的数量少于 3。</p>\n</div>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li>树中的节点数目在 <code>[1, 2000]</code> 范围内。</li>\n\t<li><code>1 <= Node.val <= 2000</code></li>\n\t<li><code>1 <= k <= 1024</code></li>\n</ul>\n",
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