using System;

​

public class Date

{

    private int day;

    private int month;

    private int year;

    public Date(int d,int m,int y)

    {

        this.day=d;

        this.month=m;

        this.year=y;

    }

    public int getDay()

    {

        return this.day;

    }

    public int getMonth()

    {

        return this.month;

    }

    public int getYear()

    {

        return this.year;

    }

    public int compareTo(Date d)

    {

        if(this.year>d.year)

            return 1;

        if(this.year<d.year)

            return -1;

        if(this.month>d.month)

            return 1;

        if(this.month<d.month)

            return -1;

        if(this.day>d.day)

            return 1;

        if(this.day<d.day)

            return -1;

        return 0;

    }

    public override string ToString()

    {

        return this.day+"/"+this.month+"/"+this.year;

    }

}

​

public class Passport

{

    private string name;

    private int number;

    private Date ED;

    public Passport(string na,int nu,Date ED)

    {

        this.name=na;

        this.number=nu;

        this.ED=new Date(ED.getDay(),ED.getMonth(),ED.getYear());

    }

    public Passport(Passport p)

    {

        this.name=p.name;

        this.number=p.number;

        this.ED=new Date(p.ED.getDay(),p.ED.getMonth(),p.ED.getYear());

    }

    public bool isValid(Date d)

    {

        if (this.ED.compareTo(d)>0)

            return true;

        return false;

    }

    public override string ToString()

    {

        return " name: "+this.name+"\n number: "+this.number+"\n ED: "+this.ED;

    }

}

public class traveler

{

private Passport p;

private bool pay;

public traveler(Passport p,bool a)

{

this.p=p;

this.pay=a;

}

public bool check(Date a)

{ 

    return p.isValid(a);

}

public void pay1()

{

this.pay=true;

}

public bool haspaid()

{

return this.pay;

}

public override string ToString()

{

return this.p+"\n paid: "+this.pay;

}

} 

public class commands

{

private traveler b;

private string a;

​

public commands(string a,traveler b)

{

this.a=a;

this.b=b;

if(this.a=="hi")

Console.Write("hello");

if(this.a=="bye")

{

Console.Write("see you soon");

Console.Clear();

}

if(this.a=="calculate")

Console.Write("aint good at math");

if(this.a=="how is the weather")

Console.Write("no idea");

if(this.a=="what's your name")

Console.Write(this.b);

if(this.a=="how old are you")

Console.Write("i'm older than time itself");

}

​

public void addcomment(string a,string b)

{

if(this.a==a)

Console.Write(b);

}

}

public class Program

{

    public static void Main()

    {

        Date d2=new Date(1,2,2003);

        string b3=Console.ReadLine();

        Passport p1=new Passport("daniel",213141,d2);

        traveler a=new traveler(p1,true);

        commands m=new commands(b3,a);

        m.addcomment("what do you like to do","i like wasting my priceiuse on dummies like you ");

    }

}