mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 03:33:12 +08:00
31 lines
889 B
HTML
31 lines
889 B
HTML
<p>给你一个二叉树的根节点 <code>root</code> ， 检查它是否轴对称。</p>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>示例 1：</strong></p>
|
||
<img alt="" src="https://pic.leetcode.cn/1698026966-JDYPDU-image.png" style="width: 354px; height: 291px;" />
|
||
<pre>
|
||
<strong>输入：</strong>root = [1,2,2,3,4,4,3]
|
||
<strong>输出：</strong>true
|
||
</pre>
|
||
|
||
<p><strong>示例 2：</strong></p>
|
||
<img alt="" src="https://pic.leetcode.cn/1698027008-nPFLbM-image.png" style="width: 308px; height: 258px;" />
|
||
<pre>
|
||
<strong>输入：</strong>root = [1,2,2,null,3,null,3]
|
||
<strong>输出：</strong>false
|
||
</pre>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>提示：</strong></p>
|
||
|
||
<ul>
|
||
<li>树中节点数目在范围 <code>[1, 1000]</code> 内</li>
|
||
<li><code>-100 <= Node.val <= 100</code></li>
|
||
</ul>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>进阶：</strong>你可以运用递归和迭代两种方法解决这个问题吗？</p>
|