Book Reservation System

In a theater, you have a fixed number of seats which can be reserved. Given the list of seat numbers that have already been reserved, determine if a requested seat number is available for reservation. Input: - The first line contains the integer R (1 ≤ R ≤ 10^5), the number of reserved seats. - The second line contains R space-separated integers representing the reserved seat numbers. - The third line contains an integer S (1 ≤ S ≤ 10^6), the requested seat number for reservation. Output: - Print 'Available' if the seat number is not reserved, otherwise print 'Unavailable'. Example: Input: 5 10 15 20 30 5 12 Output: Available