How should I practice Profiling Events from Consecutive Stack Samples?

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Problem · Array

Profiling Events from Consecutive Stack Samples

● Hard

AnthropicFULLTIMEPHONE SCREEN

Problem statement

A sampling profiler records the active call stack at strictly increasing timestamps. You are given parallel arrays:

The problem statement continues

Pro

Examples

Example 1

timestamps = [10,20,30,40,50]stacks = [["main"],["main","parse"],["main","parse"],["main"],["main"]]n = 2return = [["start","20","main"],["start","30","parse"],["end","40","parse"]]

main is confirmed at timestamp 20. parse is confirmed at 30 and ends when it is absent at 40. No final end is synthesized for main.

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