Employee free time intervals
Your task
You are given schedule, a list of employees, where each employee is a list of non-overlapping busy intervals [start, end] sorted by start. Return the list of finite COMMON free-time intervals shared by ALL employees, sorted by start, each as [start, end]. Free time before everyone's first meeting and after everyone's last is unbounded and must NOT be included. Flatten all intervals, merge overlaps, and report the gaps. Up to 50 employees, 50 intervals each.
Examples
employee_free_time(schedule: list[list[list[int]]]) -> list[list[int]]Example 1
Input
employee_free_time([[[1, 2], [5, 6]], [[1, 3]], [[4, 10]]])Output
[[3, 4]]