from dataclasses import dataclass
from typing import Literal


@dataclass
class Request:
    request_time: int
    plane: Plane

@dataclass
class ProcessedRequest(Request):
    start_process_time: int
    process_time: int
    type_: Literal["landing", "launching"]

class Plane:
    __id_increment = 0

    def __init__(self) -> None:
        self.id = self.__id_increment
        Plane.__id_increment += 1