using System;

public class Program

{

    public static void Main()

    {

        Train t1=new Train(3);

        Train t2=new Train(3);

        t1.AddCarriage(new Carriage(54,5,6));

        Console.WriteLine(CountEmpty(t1))

​

​

    }

​

}

public class Carriage 

{

    private int Number;

    private int Capacity;

    private int Passengers;

    public Carriage(int Number, int Capacity, int Passengers)

    {

        this.Number = Number;

        this.Capacity = Capacity;

        this.Passengers = Passengers;

    }

    public bool IsFull()

    {

        if(this.Passengers>=this.Capacity)

        {

            return true;

        }

        return false;

    }

    public void SetNumber(int Number)

    {

        this.Number = Number;

    }

    public void SetCapacity(int Capacity)

    {

        this.Capacity = Capacity;

    }

    public void SetPassengers(int Passengers)

    {

        this.Passengers = Passengers;

    }

    public int GetNumber()

    {

        return this.Number;

    }

    public int GetCapacity()

    {

        return this.Capacity;

    }

    public int GetPassengers()

    {

        return this.Passengers;

    }

}

public class Train

{

    private int Number;

    private Carriage[] capacity;

    private int counter;

    public Train(int Number)

    {

        this.Number=Number;

        this.capacity = new Carriage[10];

        this.counter=0;

    }

    public void AddCarriage(Carriage c)

    {

        capacity[counter]=c;

        counter++;

    }

    public int CountEmpty()

    {

        int a = 0; 

        for (int i=0;i< Number;i++)

        {

            if(capacity[i].GetCapacity()>capacity[i].GetPassengers())

            {   

            a++;

            }

        }

        return a;

    }

    public static int CountEmpty(Train t)

    {

        return t.CountEmpty();

    }

}