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DIY: Time Needed to Inform All Employees

Explore how to compute the total minutes required to inform every employee in a company through a hierarchical message passing system. Understand the problem involving manager-subordinate relationships and implement a function to calculate the time based on informing delays at each level.

Problem statement

A company has n employees, and each employee has a unique ID from 0 to n - 1. The ID of the head of the company is headID.

Each employee has one direct manager given in the manager array. In the manager array, manager[i] is the direct manager of the i-th employee, ...