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Grokking the Coding Interview Patterns in JavaScript

Solution: Employee Free Time

Understand how to find common free time intervals from multiple employee schedules by merging overlapping intervals. Learn to use a min-heap to efficiently process and identify gaps between meetings. This lesson helps you implement an optimal scheduling solution and analyze time and space complexity.

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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 ...