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add leetcode problem-cn part5

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2022-03-27 20:52:13 +08:00
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<p>给定一棵二叉树,你需要计算它的直径长度。一棵二叉树的直径长度是任意两个结点路径长度中的最大值。这条路径可能穿过也可能不穿过根结点。</p>
<p>&nbsp;</p>
<p><strong>示例 :</strong><br>
给定二叉树</p>
<pre> 1
/ \
2 3
/ \
4 5
</pre>
<p>返回&nbsp;<strong>3</strong>, 它的长度是路径 [4,2,1,3] 或者&nbsp;[5,2,1,3]。</p>
<p>&nbsp;</p>
<p><strong>注意:</strong>两结点之间的路径长度是以它们之间边的数目表示。</p>