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Quick Summary
Parse colon-delimited log strings to extract thread IDs and timestamps.
Group all log entries into a hash map keyed by thread ID.
Sort each group's logs in ascending order based on their numeric timestamp.
What This Tests
String parsing and substring extraction
Hash map usage for efficient key-value grouping
Custom comparator implementation for numerical sorting
Handling delimited string edge cases
Common Patterns
Hashing
Sorting
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python
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