Grokking the Coding Interview: Patterns for Coding Questions
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Problem Challenge 2: Path with Maximum Sum (hard)

Problem Statement

Find the path with the maximum sum in a given binary tree. Write a function that returns the maximum sum.

A path can be defined as a sequence of nodes between any two nodes and doesn’t necessarily pass through the root. The path must contain at least one node.


  • The number of nodes in the tree is in the range [1, 3 * 10<sup>4</sup>].
  • -1000 <= Node.val <= 1000

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