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"translatedContent": "<p>输入一棵二叉树的根节点,判断该树是不是平衡二叉树。如果某二叉树中任意节点的左右子树的深度相差不超过1,那么它就是一棵平衡二叉树。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n\n<p>给定二叉树 <code>[3,9,20,null,null,15,7]</code></p>\n\n<pre>\n 3\n / \\\n 9 20\n / \\\n 15 7</pre>\n\n<p>返回 <code>true</code> 。<br />\n<br />\n<strong>示例 2:</strong></p>\n\n<p>给定二叉树 <code>[1,2,2,3,3,null,null,4,4]</code></p>\n\n<pre>\n 1\n / \\\n 2 2\n / \\\n 3 3\n / \\\n 4 4\n</pre>\n\n<p>返回 <code>false</code> 。</p>\n\n<p> </p>\n\n<p><strong>限制:</strong></p>\n\n<ul>\n\t<li><code>0 <= 树的结点个数 <= 10000</code></li>\n</ul>\n\n<p>注意:本题与主站 110 题相同:<a href=\"https://leetcode-cn.com/problems/balanced-binary-tree/\">https://leetcode-cn.com/problems/balanced-binary-tree/</a></p>\n\n<p> </p>\n",
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