This code snippet defines a class Solution with a method rangeSumBST that calculates the sum of all node values in a binary search tree (BST) that fall within a given range (low to high). It uses a depth-first search (DFS) algorithm

Range Sum of Binary Search Tree.md

Range Sum of Binary Search Tree

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# Python3 Solution
class Solution:
    def rangeSumBST(self, root: TreeNode, low: int, high: int) -> int:
        def dfs(node):
            if not node:
                return
            if low <= node.val <= high:
                self.total_sum += node.val
                dfs(node.left)
                dfs(node.right)
            elif node.val < low:
                dfs(node.right)
            elif node.val > high:
                dfs(node.left)

        self.total_sum = 0
        dfs(root)
        return self.total_sum

Associated Context
Type	Code Snippet ( .py )
Associated Tags	Python3 Solution rangeSumBST function TreeNode class low parameter high parameter dfs method total_sum variable left node right node val property numpy breadth-first-search depth-first-search algorithm Range Sum BST Binary Search Tree TreeNode DFS (Depth-First Search) Recursive Function Tree Traversal In-order Traversal Binary Tree Algorithm
📝 Custom Description	YouTube Video Explanation: Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
💡 Smart Description	This code snippet defines a class Solution with a method rangeSumBST that calculates the total sum of nodes in a binary tree based on their values. The function recursively checks if each node is valid, and then updates the total_sum variable to 0 This code snippet defines a class Solution with a method rangeSumBST that calculates the sum of all node values in a binary search tree (BST) that fall within a given range (low to high). It uses a depth-first search (DFS) algorithm
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Related People	Rohan Mallick
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