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11 Months of Service
Instead of walking through your full time range by hops of 30 mn, you just have to hop from event to event (an event being "the start or end of a booking").
Thus you'll have a timeline of all your bookings starts and ends sorted together, with a counter that makes +1 when it encounters a start date and -1 for an end date. When the counter reaches n, go for the red flag!
Thus you'll have a timeline of all your bookings starts and ends sorted together, with a counter that makes +1 when it encounters a start date and -1 for an end date. When the counter reaches n, go for the red flag!
