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Quick Summary
Rank songs by calculating a 'beat count' derived from pairwise majority votes across multiple user preference lists.
Compare every pair of songs to determine a winner based on user preference order and specific tie-breaking rules.
Sort the final list of songs by their total beat counts in descending order, using song ID as a secondary sort key.
What This Tests
Parsing and manipulating multi-dimensional arrays
Implementing custom comparison logic and tie-breakers
Optimizing lookups to reduce time complexity
Applying sorting algorithms with complex criteria
Common Patterns
Hashing
Sorting
Simulation
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Accepted
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Acceptance Rate
55.6%
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Python3
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Input
pref =
Output
Expected
