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Quick Summary

Simulate an in-memory music player that tracks song additions and user plays.
Maintain efficient mappings between song IDs, titles, and distinct user listeners.
Generate a formatted analytics report sorted by listener count and title.

What This Tests

Hash map usage for constant-time key-value operations
Set data structures for tracking distinct elements
Multi-criteria custom sorting
Object-oriented state management

Common Patterns

Hashing

Sorting

Test Cases

Input

Output

Expected