Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in Python

Solution: Path Sum

Explore how to use depth-first search to find if a root-to-leaf path in a binary tree equals a given targetSum. Understand how to recursively check nodes, handling base cases and leveraging logical operators to validate paths efficiently.

We'll cover the following...

Statement

Given the root of a binary tree and an integer targetSum, determine whether there exists a root to leaf path in the tree such that the sum of all node values along the path equals targetSum. Return TRUE if such a path exists, and FALSE otherwise.

Note: A leaf is defined as a node that has no left or right children.

Constraints:

  • The number of nodes in the tree is in the range [0,5000][0, 5000].

  • ...