mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
37 lines
1.2 KiB
HTML
37 lines
1.2 KiB
HTML
<p>给定一个二叉树的 <strong>根节点</strong> <code>root</code>，请找出该二叉树的 <strong>最底层 最左边 </strong>节点的值。</p>
|
|
|
|
<p>假设二叉树中至少有一个节点。</p>
|
|
|
|
<p> </p>
|
|
|
|
<p><strong>示例 1:</strong></p>
|
|
|
|
<p><img src="https://assets.leetcode.com/uploads/2020/12/14/tree1.jpg" style="width: 182px; " /></p>
|
|
|
|
<pre>
|
|
<strong>输入: </strong>root = [2,1,3]
|
|
<strong>输出: </strong>1
|
|
</pre>
|
|
|
|
<p><strong>示例 2: </strong></p>
|
|
|
|
<p><img src="https://assets.leetcode.com/uploads/2020/12/14/tree2.jpg" style="width: 242px; " /><strong> </strong></p>
|
|
|
|
<pre>
|
|
<strong>输入: </strong>[1,2,3,4,null,5,6,null,null,7]
|
|
<strong>输出: </strong>7
|
|
</pre>
|
|
|
|
<p> </p>
|
|
|
|
<p><strong>提示:</strong></p>
|
|
|
|
<ul>
|
|
<li>二叉树的节点个数的范围是 <code>[1,10<sup>4</sup>]</code></li>
|
|
<li><meta charset="UTF-8" /><code>-2<sup>31</sup> <= Node.val <= 2<sup>31</sup> - 1</code> </li>
|
|
</ul>
|
|
|
|
<p> </p>
|
|
|
|
<p><meta charset="UTF-8" />注意：本题与主站 513 题相同： <a href="https://leetcode-cn.com/problems/find-bottom-left-tree-value/">https://leetcode-cn.com/problems/find-bottom-left-tree-value/</a></p>
|