PYTHON PROBLEM 298 · Interview-Level

Find maximum binary-tree path sum: All negative values

Choose the least negative single node when every extension would reduce the sum.

tree DP · postorder · hardtree DPpostorderhard

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests find maximum binary-tree path sum. It belongs to the Trees and Tries roadmap and uses the tree dp · postorder · hard pattern.

Traversal, recursion on hierarchies, binary-search-tree rules, prefix lookup, and subtree reasoning.

COMPLETE WORKSPACE

Learn the plan, trace the logic and run the solution

Complete access unlocks the full statement, input and output examples, visual execution plan, hints, browser compiler, solution and line-by-line interpretation.

Unlock all 360 problems · ₹599One full year · one payment · no automatic renewal

SKILL TO CARRY FORWARD

Pattern relevance

This exercise strengthens tree dp · postorder · hard. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.