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

Solution: Path Sum

Explore how to apply depth-first search to determine if any root-to-leaf path in a binary tree sums to a target value. Learn the step-by-step recursive approach, handling edge cases, and analyzing time and space complexities for balanced and skewed trees.

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].

  • ...