二叉搜索树的范围和
938. 二叉搜索树的范围和 (Easy)
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]
内 1 <= Node.val <= 105
1 <= low <= high <= 105
- 所有
Node.val
互不相同