Project Notes

Maximum Depth of Binary Tree

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Description

tab: English
 
<p>Given the <code>root</code> of a binary tree, return <em>its maximum depth</em>.</p>
 
<p>A binary tree&#39;s <strong>maximum depth</strong>&nbsp;is the number of nodes along the longest path from the root node down to the farthest leaf node.</p>
 
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2020/11/26/tmp-tree.jpg" style="width: 400px; height: 277px;" />
<pre>
<strong>Input:</strong> root = [3,9,20,null,null,15,7]
<strong>Output:</strong> 3
</pre>
 
<p><strong class="example">Example 2:</strong></p>
 
<pre>
<strong>Input:</strong> root = [1,null,2]
<strong>Output:</strong> 2
</pre>
 
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
 
<ul>
	<li>The number of nodes in the tree is in the range <code>[0, 10<sup>4</sup>]</code>.</li>
	<li><code>-100 &lt;= Node.val &lt;= 100</code></li>
</ul>
 
 
 
---
 
[submissions](https://leetcode.com/problems/maximum-depth-of-binary-tree/submissions/) | [solutions](https://leetcode.com/problems/maximum-depth-of-binary-tree/solutions/)
 
 
tab: 中文
 
<p>给定一个二叉树 <code>root</code> ，返回其最大深度。</p>
 
<p>二叉树的 <strong>最大深度</strong> 是指从根节点到最远叶子节点的最长路径上的节点数。</p>
 
<p>&nbsp;</p>
 
<p><strong>示例 1：</strong></p>
 
<p><img alt="" src="https://assets.leetcode.com/uploads/2020/11/26/tmp-tree.jpg" style="width: 400px; height: 277px;" /></p>
 
<p>&nbsp;</p>
 
<pre>
<b>输入：</b>root = [3,9,20,null,null,15,7]
<b>输出：</b>3
</pre>
 
<p><strong>示例 2：</strong></p>
 
<pre>
<b>输入：</b>root = [1,null,2]
<b>输出：</b>2
</pre>
 
<p>&nbsp;</p>
 
<p><strong>提示：</strong></p>
 
<ul>
	<li>树中节点的数量在&nbsp;<code>[0, 10<sup>4</sup>]</code>&nbsp;区间内。</li>
	<li><code>-100 &lt;= Node.val &lt;= 100</code></li>
</ul>
 
 
 
---
 
[提交记录](https://leetcode.cn/problems/maximum-depth-of-binary-tree/submissions/) | [题解](https://leetcode.cn/problems/maximum-depth-of-binary-tree/solution/)

Solutions & Notes

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