using System;

public class student

{

    public string name;

    public string lastname;

    public long  id;

    public int age;

    public student()

    { name="Matin";

    }

    public student(string st_lastName,int st_Age, long st_Id)

    {

        lastname=st_lastName;

        id=st_Id;

        age=st_Age;

    }

    public static void Main(string[] args)

    {

        student myName=new student();

        Console.WriteLine(myName.name);

        student university=new student("Negahbanpour",22, 9942144964);

        Console.WriteLine(university.lastname+" "+university.age+" "+university.id);

    }

}