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Solution: Exclusive Time of Functions

Understand how to use a stack to calculate the exclusive execution time of functions in a single-threaded CPU environment. This lesson guides you through interpreting execution logs, managing nested function calls, and applying stack operations to solve timing problems efficiently.

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 ...