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题目描述

给定二叉搜索树的根结点 root,返回值位于范围 [low, high] 之间的所有结点的值的和。

 

示例 1:

输入:root = [10,5,15,3,7,null,18], low = 7, high = 15
输出:32

示例 2:

输入:root = [10,5,15,3,7,13,18,1,null,6], low = 6, high = 10
输出:23

 

提示:

  • 树中节点数目在范围 [1, 2 * 104]
  • 1 <= Node.val <= 105
  • 1 <= low <= high <= 105
  • 所有 Node.val 互不相同

解法

Python3

Java

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