Practice Affirm Coding Question | Real Coding Interviews

Quick Summary

Count how often pairs of stores appear together in the same shopping session.
Group companion stores by each target store and sort them by co-occurrence frequency descending, then lexicographically.
Return the final results as a nested list sorted alphabetically by target store.

What This Tests

Common Patterns

HashingSorting

Hint 1

Hint 2

What Interviewers May Ask Next

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Test Cases

Input

Output

Expected