What this Python exercise asks you to practise
This scenario tests merge numeric dictionaries. It belongs to the Sets and Dictionaries roadmap and uses the get · merge pattern.
Uniqueness, membership tests, key-value lookup, frequency counting, and grouping.
Learn the plan, trace the logic and run the solution
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This exercise strengthens get · merge. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.