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Quick Summary

Group unordered access logs by user and sort each user's entries chronologically.
Count transitions between consecutive resources, including virtual START and END states.
Calculate outgoing probabilities per source and return results formatted to two decimal places in lexicographical order.

What This Tests

Hash map grouping and aggregation
Composite sorting and ordering
Probability computation and numeric formatting
Path reconstruction from disjoint sequences

Common Patterns

Hashing

Sorting

Test Cases

Input

Output

Expected