using System;
using System.Collections;
using System.Collections.Generic;

namespace lab5
{
    class MainClass
    {
        public interface IGetInfo
        {
            void print();
        }

        public enum CourseOfStudy
        {
            First, Second, Third, Fourth
        }

        public class Person : IComparable<Person>, IGetInfo
        {
            protected int age;
            protected string name, surname;

            public int CompareTo(Person other)
            {
                return other.age.CompareTo(this.age);
            }

            public Person(int age, string name, string surname)
            {
                this.age = age;
                this.name = name;
                this.surname = surname;
            }

            public virtual void print ()
            {
                Console.WriteLine("Age = " + age);
                Console.WriteLine("Name = " + name);
                Console.WriteLine("Surname = " + surname);
            }
        }

        public class Student : Person
        {
            protected CourseOfStudy currCourse;
            protected string university;

            public Student(int age, string name , string surname, CourseOfStudy course, string university)
                :base(age, name, surname)
            {
                this.currCourse = course;
                this.university = university;
            }

            public override void print ()
            {
                base.print();
                Console.WriteLine("University = " + university);
                Console.WriteLine("Course = " + currCourse);
            }
        }

        public class StudentOfCSaN
        {
            protected string speciality;

            public StudentOfCSaN(string speciality)
            {
                this.speciality = speciality;
            }

            public void print()
			{
                Console.WriteLine("Speciality = " + speciality);
			}
		}

        public static void Main(string[] args)
        {
            List <Person> my = new List<Person>();

            my.Add(new Person(123, "a", "fdj"));
            my.Add(new Person(2223, "b", "fdj"));
            my.Add(new Person(1333, "c", "fdj"));
            my.Add(new Person(123, "d", "fdj"));

            my.Sort();

            foreach(var t in my)
            {
                t.print();
                Console.WriteLine();
            }
            Console.WriteLine();

            /*List<Student> my2 = new List<Student>();
            my2.Add(new Student(123, "a", "ds", (CourseOfStudy)2, "qew"));
            my2.Add(new Student(113, "a", "ds", (CourseOfStudy)2, "qew"));
            my2.Add(new Student(13123, "a", "ds", (CourseOfStudy)2, "qew"));
            my2.Add(new Student(123333, "a", "ds", (CourseOfStudy)2, "qew"));

            my2.Sort();
            foreach(var t in my2)
            {
                t.print();
                Console.WriteLine();
            }*/
        }
    }
}