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42 lines
2.4 KiB
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<p><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">给定一个二叉搜索树</font></span></span></span></span> <code>root</code> (BST)<span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">，请将它的每个</font></span></span></span></span>节点<span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">的值替换成树中大于或者等于该</font></span></span></span></span>节点<span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">值的所有</font></span></span></span></span>节点<span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">值之和。</font></span></span></span></span></p>
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<p>提醒一下， <em>二叉搜索树</em> 满足下列约束条件：</p>
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<ul>
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<li>节点的左子树仅包含键<strong> 小于 </strong>节点键的节点。</li>
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<li>节点的右子树仅包含键<strong> 大于</strong> 节点键的节点。</li>
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<li>左右子树也必须是二叉搜索树。</li>
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</ul>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<p><strong><img alt="" src="https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/05/03/tree.png" style="height:273px; width:400px" /></strong></p>
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<pre>
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<strong>输入：</strong>[4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
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<strong>输出：</strong>[30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
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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>root = [0,null,1]
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<strong>输出：</strong>[1,null,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>树中的节点数在 <code>[1, 100]</code> 范围内。</li>
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<li><code>0 <= Node.val <= 100</code></li>
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<li>树中的所有值均 <strong>不重复</strong> 。</li>
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</ul>
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<p> </p>
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<p><strong>注意：</strong>该题目与 538: <a href="https://leetcode-cn.com/problems/convert-bst-to-greater-tree/">https://leetcode-cn.com/problems/convert-bst-to-greater-tree/ </a>相同</p>
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