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MyCalendarTwo - Step-by-Step Explanation (Multiple Languages)

In this problem, the goal is to implement a booking system where events can be added if they do not result in more than two overlapping events. If a triple booking (three overlapping events) occurs, the booking is rejected. Below is a step-by-step explanation of the logic behind the code for each language.

C++ Code

Step 1: Check for Triple Booking

  • Loop through the double_booked intervals, which store already double-booked ranges.
  • If the new event overlaps with any double-booked range, it would cause a triple booking.
  • If such an overlap is found, return false to reject the booking.

Step 2: Identify Overlaps for Double Booking

  • Loop through the single booked intervals.
  • If the new event overlaps with a single-booked event, calculate the overlap and store it in double_booked to keep track of double bookings.

Step 3: Add the Event to Single Bookings

  • If no triple booking is detected, add the new event to single booked intervals.

Step 4: Confirm the Booking

  • Return true to indicate the event has been successfully booked.

Java Code

Step 1: Check for Triple Booking

  • Iterate through doubleBooked, the list storing intervals that have already been booked twice.
  • If the new event overlaps with any interval in doubleBooked, return false to reject the booking due to potential triple booking.

Step 2: Identify Overlaps for Double Booking

  • Loop through single bookings, and if the new event overlaps with any single-booked interval, add the overlapping part to doubleBooked.

Step 3: Add the Event to Single Bookings

  • If the event does not result in a triple booking, add it to the list single.

Step 4: Return Success

  • Return true if the booking is successful.

JavaScript Code

Step 1: Check for Triple Booking

  • Loop through the doubleBooked array.
  • Check if the new event overlaps with any already double-booked interval.
  • If an overlap is found, return false because it would result in a triple booking.

Step 2: Identify Overlaps for Double Booking

  • Loop through single bookings.
  • For each single-booked interval that overlaps with the new event, add the overlapping part to doubleBooked.

Step 3: Add the Event to Single Bookings

  • Add the new event to the single array after ensuring no triple booking occurs.

Step 4: Confirm the Booking

  • Return true if the event is successfully booked.

Python Code

Step 1: Check for Triple Booking

  • Loop through the double_booked intervals.
  • If the new event overlaps with any double-booked interval, return false because a triple booking would occur.

Step 2: Identify Overlaps for Double Booking

  • Loop through single booked intervals.
  • For any overlap between the new event and existing single bookings, add the overlapping part to double_booked.

Step 3: Add the Event to Single Bookings

  • If no triple booking is detected, add the event to single bookings.

Step 4: Confirm the Booking

  • Return true if the booking is successful.

Go Code

Step 1: Check for Triple Booking

  • Iterate through doubleBooked intervals.
  • If the new event overlaps with any double-booked interval, return false as it would cause a triple booking.

Step 2: Identify Overlaps for Double Booking

  • Loop through the single intervals.
  • For any overlap with the new event, append the overlapping interval to doubleBooked.

Step 3: Add the Event to Single Bookings

  • Add the new event to the single bookings if no triple booking is detected.

Step 4: Return the Booking Status

  • Return true if the event is successfully booked without causing triple bookings.

Conclusion

The logic across all languages remains consistent:

  1. Check for triple bookings (overlaps in double-booked intervals).
  2. Store overlaps of new events with single-booked intervals as double bookings.
  3. Add the new event to single-booked intervals if no triple booking is found.
  4. Return true if the booking is successful, otherwise return false.