Problem · Tree

Maximum Sum Path Between Two Leaf Nodes

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Problem statement

Given the root of a binary tree whose nodes contain integer values, return the maximum sum of the node values along a simple path whose two endpoints are distinct leaves.

The problem statement continues
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Examples

Example 1

root = [1,2,3]return = 6

The only leaf-to-leaf path is 2 - 1 - 3, whose node values sum to 6.

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FastPrep Pro
Reported in 1 Google interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 2 more worked examples, explained
  • Guided hints and editorial
  • Run your code on real test cases
$9/month

Pro subscription, billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week