Interval Gap Finder

Given a set of intervals representing busy time slots in a day, find all the free time intervals, assuming the day starts at 0 and ends at 24. Each interval is given as [start, end]. If there are no free intervals, the output should indicate that. Input: The first line contains an integer n (1 ≤ n ≤ 10^5) — the number of busy intervals. The next n lines each contain two integers (0 ≤ start < end ≤ 24) representing busy time slots. Output: Print the free time intervals in the format [start, end], or print 'No free time' if the entire day is booked. Example: Input: 3 1 2 2 3 4 5 Output: [0, 1] [3, 4] [5, 24]