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Solution: Exclusive Time of Functions

Explore how to calculate the exclusive time each function runs in a single-threaded CPU using a stack-based approach. Understand how to track start and end events, handle nested function calls, and implement an efficient algorithm to solve this common coding interview pattern.

Statement

We are given an integer number, n, representing the number of functions running in a single-threaded CPU, and an execution log, which is essentially a list of strings. Each string has the format {function id}:{"start" | "end"}:{timestamp}, indicating that the function with function id either started or stopped execution at the time identified by the timestamp value. Each function has a unique ID between 00 and n1n-1 ...