What this Python exercise asks you to practise
This scenario tests calculate binary-tree diameter. It belongs to the Trees and Tries roadmap and uses the binary tree · postorder · company screen pattern.
Traversal, recursion on hierarchies, binary-search-tree rules, prefix lookup, and subtree reasoning.
Learn the plan, trace the logic and run the solution
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This exercise strengthens binary tree · postorder · company screen. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.