Level 1

Foundations · Data and input

Use AI and search freely. Choose a problem by level; starting it records a separate timed attempt. Each problem is graded on accuracy (50), performance (30), and time (20).

1. 1-160 min

   Project search

   Search names and tags without changing the input.

   Choose problem
2. 1-245 min

   Normalize profile inputs

   Clean up strings and report invalid fields.

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3. 1-345 min

   Deduplicate events

   Keep the latest event per ID in a stable order.

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4. 1-430 min

   Paginate search results

   Build pagination that handles boundary values.

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