PYTHON PROBLEM 137 · Beginner

Traverse a binary tree by levels

Print each depth of a small complete tree on its own line.

tree · BFStreeBFS

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests traverse a binary tree by levels. It belongs to the Trees and Tries roadmap and uses the tree · bfs 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

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SKILL TO CARRY FORWARD

Pattern relevance

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