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36 lines
1.4 KiB
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36 lines
1.4 KiB
HTML
<p>给定两个整数数组，<code>preorder</code> 和 <code>postorder</code> ，其中 <code>preorder</code> 是一个具有 <strong>无重复</strong> 值的二叉树的前序遍历，<code>postorder</code> 是同一棵树的后序遍历，重构并返回二叉树。</p>
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<p>如果存在多个答案，您可以返回其中 <strong>任何</strong> 一个。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<p><img src="https://assets.leetcode.com/uploads/2021/07/24/lc-prepost.jpg" style="height: 265px; width: 304px;" /></p>
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<pre>
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<strong>输入：</strong>preorder = [1,2,4,5,3,6,7], postorder = [4,5,2,6,7,3,1]
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<strong>输出：</strong>[1,2,3,4,5,6,7]
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</pre>
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<p><strong>示例 2:</strong></p>
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<pre>
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<strong>输入:</strong> preorder = [1], postorder = [1]
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<strong>输出:</strong> [1]
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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 <= preorder.length <= 30</code></li>
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<li><code>1 <= preorder[i] <= preorder.length</code></li>
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<li><code>preorder</code> 中所有值都 <strong>不同</strong></li>
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<li><code>postorder.length == preorder.length</code></li>
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<li><code>1 <= postorder[i] <= postorder.length</code></li>
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<li><code>postorder</code> 中所有值都 <strong>不同</strong></li>
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<li>保证 <code>preorder</code> 和 <code>postorder</code> 是同一棵二叉树的前序遍历和后序遍历</li>
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</ul>
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