PYTHON PROBLEM 049 · Beginner

Remove list duplicates in order

Remove repeated response codes without rearranging the first occurrences.

deduplication · orderdeduplicationorder

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests remove list duplicates in order. It belongs to the Lists, Tuples, and Nested Data roadmap and uses the deduplication · order pattern.

Ordered collections, mutation, traversal, copying, matrices, and sequence reasoning.

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SKILL TO CARRY FORWARD

Pattern relevance

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