#1845

Seat Reservation Manager

specialist · 605 · lc medium +29 · 67.1% accepted · 1,477 likes · top 73%

Description

Design a seat reservation manager for n seats numbered 1 through n.

Implement the SeatManager class:

- SeatManager(int n) — Initializes with all n seats available.

- int reserve() — Reserves and returns the smallest-numbered available seat.

- void unreserve(int seatNumber) — Makes the given seat available again.

Example 1:

Input

["SeatManager", "reserve", "reserve", "unreserve", "reserve", "reserve", "reserve", "reserve", "unreserve"]

[[5], [], [], [2], [], [], [], [], [5]]

Output

[null, 1, 2, null, 2, 3, 4, 5, null]

Example 2:

Explanation

SeatManager seatManager = new SeatManager(5); // Initializes a SeatManager with 5 seats.

seatManager.reserve(); // All seats are available, so return the lowest numbered seat, which is 1.

seatManager.reserve(); // The available seats are [2,3,4,5], so return the lowest of them, which is 2.

seatManager.unreserve(2); // Unreserve seat 2, so now the available seats are [2,3,4,5].

seatManager.reserve(); // The available seats are [2,3,4,5], so return the lowest of them, which is 2.

seatManager.reserve(); // The available seats are [3,4,5], so return the lowest of them, which is 3.

seatManager.reserve(); // The available seats are [4,5], so return the lowest of them, which is 4.

seatManager.reserve(); // The only available seat is seat 5, so return 5.

seatManager.unreserve(5); // Unreserve seat 5, so now the available seats are [5].

Code

class SeatManager:

    def __init__(self, n: int):
        

    def reserve(self) -> int:
        

    def unreserve(self, seatNumber: int) -> None:
        


# Your SeatManager object will be instantiated and called as such:
# obj = SeatManager(n)
# param_1 = obj.reserve()
# obj.unreserve(seatNumber)

class SeatManager:

    def __init__(self, n: int):
        

    def reserve(self) -> int:
        

    def unreserve(self, seatNumber: int) -> None:
        


# Your SeatManager object will be instantiated and called as such:
# obj = SeatManager(n)
# param_1 = obj.reserve()
# obj.unreserve(seatNumber)