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26 lines
965 B
HTML
26 lines
965 B
HTML
<p><em>满二叉树</em>是一类二叉树，其中每个结点恰好有 0 或 2 个子结点。</p>
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<p>返回包含 <code>N</code> 个结点的所有可能满二叉树的列表。 答案的每个元素都是一个可能树的根结点。</p>
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<p>答案中每个树的每个<code>结点</code>都<strong>必须</strong>有 <code>node.val=0</code>。</p>
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<p>你可以按任何顺序返回树的最终列表。</p>
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<p> </p>
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<p><strong>示例：</strong></p>
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<pre><strong>输入：</strong>7
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<strong>输出：</strong>[[0,0,0,null,null,0,0,null,null,0,0],[0,0,0,null,null,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,null,null,null,null,0,0],[0,0,0,0,0,null,null,0,0]]
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<strong>解释：</strong>
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<img alt="" src="https://aliyun-lc-upload.oss-cn-hangzhou.aliyuncs.com/aliyun-lc-upload/uploads/2018/08/24/fivetrees.png" style="height: 400px; width: 700px;">
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= N <= 20</code></li>
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</ul>
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