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Grokking the Coding Interview Patterns in JavaScript

Solution: Employee Free Time

Explore how to calculate shared free time intervals across multiple employees by merging their schedules using a min-heap approach. Understand the process of detecting gaps between sorted intervals, applying efficient data structures. This lesson helps you master interval merging patterns essential for solving scheduling problems in coding interviews.

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Statement

You’re given a list containing the schedules of multiple employees. Each person’s schedule is a list of non-overlapping intervals in a sorted order. An interval is specified with the start and end time, both being positive integers. Your task is to find the list of finite intervals representing the free time for all the employees.

Note: The common free intervals are calculated between the earliest start time and the latest end time of all meetings across all employees.

Constraints:

  • 1≤1 \leq schedule.length , schedule[i].length ≤50\leq 50

  • 0≤0 \leq interval.start < interval.end ≤108\leq 10^8 ...