struct Medicament
{
    public string name;
    public double price;
    public int quantity;
}

class Patient
{
    string name;
    int age;
    string ward;
    List<string> diseases;
    string doctor_name;
    List<Medicament> medicaments;
    double total_sum_treatment;

    public Patient()
    {
        name = "no name";
        age = 0;
        ward = "no ward";
        diseases = new List<string> ();
        doctor_name = "no doctor";
        medicaments = new List<Medicament> ();
        total_sum_treatment = 0;
    }

    public Patient(string _name, int _age, string _ward, string disease, string doctor, Medicament medicament)
    {
        name = _name;
        age = _age;
        ward = _ward;

        diseases = new List<string>();
        diseases.Add (disease);

        doctor_name = doctor;

        medicaments = new List<Medicament>();
        medicaments.Add (medicament);

        foreach (Medicament drug in medicaments)
            total_sum_treatment += drug.price * drug.quantity;
    }

    //public properties for fields
    public string Name
    {
        get { return name; }
        set { if (value != "") name = value; }
    }

    public int Age
    {
        get { return age; }
        set { if (value > 0) age = value; }
    }

    public string Ward
    {
        get { return ward; }
        set { if (value != "") ward = value; }
    }

    public string Doctor
    {
        get { return doctor_name; }
        set { if (value != "") doctor_name = value; }
    }

    public List<string> Diseases
    {
        get { return diseases; }
    }

    public List<Medicament> Medicaments
    {
        get { return medicaments; }
    }

    public double TotalSumTreatment
    {
        get { return total_sum_treatment; }
    }
}

public string this[int key]
{
    get
    {
        if (key < 0 || key >= diseases.Count)
            return String.Format("Index can't be < {0} and >{1}", 0, diseases.Count);
        else
            return diseases[key];
    }
    set
    {
        if (key < 0 || key >= diseases.Count)
            Console.WriteLine("Index can't be < {0} and >{1}", 0, diseases.Count);
        else
            diseases[key] = value;
    }
}

public Medicament this[int key]
{
    get
    {
        if (key < 0 || key >= medicaments.Count)
            return String.Format("Index can't be < {0} and >{1}", 0, medicaments.Count);
        else
            return medicaments[key];
    }
    set
    {
        if (key < 0 || key >= medicaments.Count)
            Console.WriteLine("Index can't be < {0} and >{1}", 0, medicaments.Count);
        else
            medicaments[key] = value;
    }
}