using System;

public class Program

{

    public class Time{

        int hour;

        int minute;

        public Time (int h , int m){

            this.hour = h;

            this.minute = m;

        if (this.hour > 23 || this.hour <0){

            this.hour = 0;

        }

        else if (this.minute >59 || this.minute <0){

            this.minute = 0;

        }

    }

    public class flight{

        string name;

        string destination;

        string flightcode;

        Time flighttime;

        public flight (string n , string d , string f , Time fl){

            this.name = n;

            this.destination = d;

            this.flightcode = f; 

            this.flighttime = fl;

        }

    public class airport{

        flight x [] = new flight [];

    }

    }

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}