Binary Tree Traversal | Dataford Interview Questions

Solve a DSA problem involving a binary tree and number traversal. Represent the tree as nested dictionaries with value, left, and right keys, or null for an absent child. Each root-to-leaf path forms a decimal number by concatenating node values. Return the sum of all root-to-leaf numbers. Use def sum_root_to_leaf_numbers(root):; node values are digits from 0 through 9, and an empty tree returns 0.

Constraints

0 <= number of nodes <= 1000
0 <= node.value <= 9
Each node has at most one left child and one right child
Return 0 when root is null

Function Signature

def sum_root_to_leaf_numbers(root):

Your question is Binary Tree Traversal. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

0 <= number of nodes <= 1000
0 <= node.value <= 9
Each node has at most one left child and one right child
Return 0 when root is null

Function Signature

def sum_root_to_leaf_numbers(root):

Your question is Binary Tree Traversal. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.