/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

class Student implements Cloneable{
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSurname() {
        return surname;
    }

    public void setSurname(String surname) {
        this.surname = surname;
    }

    public String getPatronymic() {
        return patronymic;
    }

    public void setPatronymic(String patronymic) {
        this.patronymic = patronymic;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        if(age>70||age<18){
            System.out.println("Invalid age for student "+this.name);
            return;
        }
        this.age = age;
    }

    public int getCredits() {
        return credits;
    }

    public void setCredits(int credits) {
        this.credits = credits;
    }

    public Subject getFavSubj(){
		return favSubj;
	}
	public void setFavSubj(Subject val){
		this.favSubj = val;
	}

    private String name = "Unknown";
    private String surname = "Unknown";
    private String patronymic = "Unknowovich";
    private int age = 18;
    private int credits;
    Subject favSubj;

    public Student(){

    }

    public Student(String name, String surname, String patronymic, int age, int credits, Subject favSubj) {
        this.name = name;
        this.surname = surname;
        this.patronymic = patronymic;
        this.setAge(age);
        this.credits = credits;
        this.favSubj = favSubj;
    }

    public String toString(){
    	return "Student["+
    	"name: "+this.name +
    	", surname: "+this.surname +
    	", patronymic: "+this.patronymic +
    	", age: "+this.age +
    	", credits: "+this.credits +
    	", favSubj: "+this.favSubj
    	+"]";
    }

    public int hashCode(){
		int result = 0;
		int c = 0;

		if(name==null)c = 0; else
		c = name.hashCode();
		result = 37*result + c;

		if(surname==null)c = 0; else
		c = surname.hashCode();
		result = 37*result + c;

		if(patronymic==null)c = 0; else
		c = patronymic.hashCode();
		result = 37*result + c;

		c = (int)age;
		result = 37*result + c;

		c = (int)credits;
		result = 37*result + c;

		if(favSubj==null)c = 0; else
		c = favSubj.hashCode();
		result = 37*result + c;


		return result;
    }

    public boolean equals(Object o) {
	    if (this == o) return true;
	    if (o instanceof Student) {
	    	if(hashCode() == o.hashCode()){
	    		Student s = (Student)o;
	        	return
					(this.name==s.name)&&
					(this.surname==s.surname)&&
					(this.patronymic==s.patronymic)&&
					(this.age==s.age)&&
					(this.credits==s.credits)&&
					(this.favSubj==s.favSubj);
	    	}else return false;
	    } else {
	        return false;
	    }
	}

	public Student clone() throws CloneNotSupportedException{
		Student s = (Student)super.clone();
		s.favSubj = favSubj.clone();

		return s;
	}

	public int compareTo(Student s){
		if(this.getCredits()==s.getCredits())
            return 0;
        else if(this.getCredits()>s.getCredits())
            return 1;
        else
            return -1;
	}
}

class Subject implements Cloneable{
	String name;
	Boolean isNormative = false;
	int hours;
	Boolean isExam = false;
	OKR sOKR;

	public Subject clone() throws CloneNotSupportedException{

		return (Subject)super.clone();
	}

	public int compareTo(Subject s){
		if(this.getHours()==s.getHours())
            return 0;
        else if(this.getHours()>s.getHours())
            return 1;
        else
            return -1;
	}

	public String toString(){
		return "Subject["+
		"name: "+this.name +
		", isNormative: "+this.isNormative +
		", hours: "+this.hours +
		", isExam: "+this.isExam +
		", sOKR: "+this.sOKR+
		"]";
	}

	public int hashCode(){
		int result = 0;
		int c = 0;

		if(name==null)c = 0; else
		c = name.hashCode();
		result = 37*result + c;

		c = (isNormative? 0 : 1);
		result = 37*result + c;

		c = (int)hours;
		result = 37*result + c;

		c = (isExam? 0 : 1);
		result = 37*result + c;

		if(sOKR==null)c = 0; else
		c = sOKR.hashCode();
		result = 37*result + c;

		return result;
	}

	public boolean equals(Object o) {
	    if (this == o) return true;
	    if (o instanceof Subject) {
	    	if(hashCode() == o.hashCode()){
	    		Subject s = (Subject)o;
	        	return
					(this.name==s.name)&&
					(this.isNormative==s.isNormative)&&
					(this.hours==s.hours)&&
					(this.isExam==s.isExam)&&
					(this.sOKR==s.sOKR);
	    	}else return false;
	    } else {
	        return false;
	    }
	}

	public String getName(){
		return name;
	}
	public void setName(String val){
		this.name = val;
	}
	public Boolean getIsNormative(){
		return isNormative;
	}
	public void setIsNormative(Boolean val){
		this.isNormative = val;
	}
	public int getHours(){
		return hours;
	}
	public void setHours(int val){
		this.hours = val;
	}
	public Boolean getIsExam(){
		return isExam;
	}
	public void setIsExam(Boolean val){
		this.isExam = val;
	}
	public OKR getSOKR(){
		return sOKR;
	}
	public void setSOKR(OKR val){
		this.sOKR = val;
	}

	public Subject(){

	}

	public Subject(String n, Boolean isNorm, int h, Boolean isExam, OKR sOKR){
		this.name = n;
		this.isNormative = isNorm;
		this.hours = h;
		this.isExam = isExam;
		this.sOKR = sOKR;
	}

	public enum OKR{
		master,
		bachelor,
		specialist
	}
}

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		/*
		У даному пакеті створити клас Main  з головним методом проекту.
		У даному методі створити 2 студенти (student1, student2), 2 предмети (subject1,
		subject2). Продемонструвати роботу з усіма виществореними методами,
		зокрема:
		1.  У створених об’єктів викликати метод toString();
		2.  Реалізувати перевірку еквівалентності об’єктів  у наступному
		форматі:
		if (subject1.equals(subject2)) {
		System.out.println("subjectsareequals!");
		  }
		elseSystem.out.println("subjectsaren'tequals!");
		 аналогічну перевірку зробити для  об’єктів класу  Student.
		3.  Засобами клонування створити об’єкти  student3 та  subject3, аналогічні  до  student1 та  subject1  відповідно.  Потім у об’єктах  student3 та subject3 внести зміни до полів ім’я / назва.
		4.  Продемонструвати порівняння об’єктів методом   compareTo()  у наступному форматі
		if (subject1.compareTo(subject2) > 0) {
		System.out.println(subject1.toString() +  " isbetter!");
		}
		elseif (subject1.compareTo(subject2) < 0) {
		System.out.println(subject2.toString() +  " isbetter!");
		}
		elseSystem.out.println("Theyaresimilar!");
		 аналогічно продемонструвати роботу з методом  compareTo() для  об’єктів класу  Student.
		5. Отримати список всіх елементів enum-класу під час виконання. Для цих цілей в кожному enum-класі компілятор створює метод:
		publicstaticEnumClass [] values ().
		Приклад використання:
		System.out.println(Arrays.toString(zminnaEnumClass.values()));

		*/

		Subject subject1 = new Subject("Math",true,30,true,Subject.OKR.bachelor);
		Subject subject2 = new Subject("Physics",true,20,false,Subject.OKR.bachelor);

		Student student1 = new Student("Taras","Tarasov","Tarasovich",22,80,subject1);
		Student student2 = new Student("Roman","Romanov","Romanovich",21,50,subject2);

		System.out.println(subject1.toString());
		System.out.println(subject2.toString());
		System.out.println(student1.toString());
		System.out.println(student2.toString());

		if (subject1.equals(subject2)) {
		System.out.println("subjects are equal!");
		  }
		else
		System.out.println("subjects aren't equal!");

		if (student1.equals(student2)) {
		System.out.println("students are equal!");
		  }
		else
		System.out.println("students aren't equal!");

		Student student3 = student1.clone();
		Subject subject3 = subject1.clone();

		subject3.setName("Arts");
		student3.setAge(30);

		System.out.println(student3);
		System.out.println(subject3);

		if (subject1.compareTo(subject2) > 0) {
			System.out.println(subject1.toString() +  " is better!");
		}
		else if (subject1.compareTo(subject2) < 0) {
			System.out.println(subject2.toString() +  " is better!");
		}

		if (student1.compareTo(student2) > 0) {
			System.out.println(student1.toString() +  " is better!");
		}
		else if (student1.compareTo(student2) < 0) {
			System.out.println(student2.toString() +  " is better!");
		}

		System.out.println(Arrays.toString(Subject.OKR.values()));
	}
}