#1562Easy· asked at 1 company
Range Sum of BST
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What we know
Example 1
Input: root = [10,5,15,3,7,null,18], low = 7, high = 15 Output: 32
7 + 10 + 15.
Example 2
Input: root = [10,5,15,3,7,13,18,1,null,6], low = 6, high = 10 Output: 23
Constraints
- •
The number of nodes in the tree is in the range
[1, 2 * 10^4]. - •
1 <= Node.val <= 10^5 - •
1 <= low <= high <= 10^5 - •
All
Node.valare unique.