Контакти

import java.text.DecimalFormat;
import java.util.Arrays;
import java.util.Scanner;
import java.util.Arrays;


abstract class Contact{
    String date;

    Contact(String date){
        this.date=date;
    }

    public int getGodina() {
        String[] datum=date.split("-");
        int godina=Integer.parseInt(datum[0]);
        return godina;
    }

    public int getMesec() {
        String[] datum=date.split("-");
        int mesec=Integer.parseInt(datum[1]);
        return mesec;
    }

    public int getDen() {
        String[] datum=date.split("-");
        int den=Integer.parseInt(datum[2]);
        return den;
    }

    public boolean isNewerThan(Contact c) {
        if(c==null) return false;
        int godina=c.getGodina();
        int mesec=c.getMesec();
        int den=c.getDen();
        if(godina<this.getGodina()) {
            return true;
        }else if(godina==this.getGodina()&&mesec<this.getMesec()) {
            return true;
        }else if(godina==this.getGodina()&&mesec==this.getMesec() && den<this.getDen()) {
            return true;
        }
        return false;
    }

    abstract public String getType();
    abstract public String getContent();
}

class EmailContact extends Contact{
    String email;

    EmailContact(String date,String email){
        super(date);
        this.email=email;
    }

    public String getEmail() {
        return email;
    }

    public String getType() {
        return "Email";
    }

    public String getContent() {
        return email;
    }
}

class PhoneContact extends Contact{
    String telBroj;
    enum Operator { VIP, ONE, TMOBILE }

    PhoneContact(String date,String phone){
        super(date);
        this.telBroj=phone;
    }

    public String getPhone() {
        return telBroj;
    }

    public String getType() {
        return "Phone";
    }

    public Operator getOperator() {
        String[] string=telBroj.split("/");
        int operatorskiBroj=Integer.parseInt(string[0]);
        operatorskiBroj%=10;
        if(operatorskiBroj==1 || operatorskiBroj==0 || operatorskiBroj==2) {
            return Operator.TMOBILE;
        }
        if(operatorskiBroj==5 || operatorskiBroj==6) {
            return Operator.ONE;
        }
        if(operatorskiBroj==7 || operatorskiBroj==8) {
            return Operator.VIP;
        }
        return null;
    }

    public String getContent() {
        return telBroj;
    }


}

class Student{
    String ime,prezime,grad;
    int godini;
    long indeks;
    Contact[] kontakti;
    int brojKontakti;
    int brojEmail,brojPhone;

    Student(){}

    Student(String firstName, String lastName, String city, int age, long index){
        ime=firstName;
        prezime=lastName;
        grad=city;
        godini=age;
        indeks=index;
        kontakti=null;
        brojKontakti=0;
        brojEmail=brojPhone=0;
    }

    public void addEmailContact(String date, String email) {
        Contact[] kontaktiNova=new Contact[brojKontakti+1];
        for(int i=0;i<brojKontakti;i++) {
            kontaktiNova[i]=kontakti[i];
        }
        kontaktiNova[brojKontakti]=new EmailContact(date,email);
        kontakti=kontaktiNova;
        brojKontakti++;
        brojEmail++;
    }

    public void addPhoneContact(String date, String phone) {
        Contact[] kontaktiNova=new Contact[brojKontakti+1];
        for(int i=0;i<brojKontakti;i++) {
            kontaktiNova[i]=kontakti[i];
        }
        kontaktiNova[brojKontakti]=new PhoneContact(date,phone);
        kontakti=kontaktiNova;
        brojKontakti++;
        brojPhone++;
    }

    public Contact[] getEmailContacts() {
        Contact[] kontaktiEmail=new Contact[brojEmail];
        int counter=0;
        for(int i=0;i<brojKontakti;i++) {
            if(kontakti[i].getType()=="Email") {
                kontaktiEmail[counter]=kontakti[i];
                counter++;
            }
        }
        return kontaktiEmail;
    }

    public Contact[] getPhoneContacts() {
        Contact[] kontaktiPhone=new Contact[brojPhone];
        int counter=0;
        for(int i=0;i<brojKontakti;i++) {
            if(kontakti[i].getType()=="Phone") {
                kontaktiPhone[counter]=kontakti[i];
                counter++;
            }
        }
        return kontaktiPhone;
    }

    public String getCity() {
        return grad;
    }

    public String getFullName() {
        return ime+" "+prezime;
    }

    public long getIndex() {
        return indeks;
    }

    public Contact getLatestContact() {
        int latestIndex=0;
        for(int i=1;i<brojKontakti;i++) {
            if(kontakti[i].isNewerThan(kontakti[latestIndex])) {
                latestIndex=i;
            }
        }
        return kontakti[latestIndex];
    }

    public String toString() {
        StringBuilder s=new StringBuilder("");
        s.append("{\"ime\":\"").append(ime).append("\", \"prezime\":\"")
        .append(prezime).append("\", \"vozrast\":").append(godini)
        .append(", \"grad\":\"").append(grad)
        .append("\", \"indeks\":").append(indeks);

        if(brojPhone==0) s.append(", \"telefonskiKontakti\":[");
        else s.append(", \"telefonskiKontakti\":[\"");

        for(int i=0;i<brojPhone;i++) {
            if(i==brojPhone-1) {s.append(getPhoneContacts()[i].getContent()).append("\"], "); break;}
            s.append(getPhoneContacts()[i].getContent()).append("\", \"");
        }
        if(brojPhone==0){
            s.append("], ");
        }
        if(brojEmail==0) s.append("\"emailKontakti\":[");
        else s.append("\"emailKontakti\":[\"");
        for(int i=0;i<brojEmail;i++) {
            if(i==brojEmail-1) {s.append(getEmailContacts()[i].getContent()).append("\"]"); break;}
            s.append(getEmailContacts()[i].getContent()).append("\", \"");
        }
        if(brojEmail==0){
            s.append("]");
        }
        s.append("}");


        return s.toString();
    }



    public int numberOfContacts() {
        return brojKontakti;
    }


}

class Faculty{
    String name;
    Student[] students;

    Faculty(String name, Student [] students){
        this.name=name;
        this.students=Arrays.copyOf(students,students.length);
    }

    public int countStudentsFromCity(String cityName){
        int num=0;
        for(int i=0;i<students.length;i++) {
            if(students[i].getCity().equals(cityName)) {
                num++;
            }
        }
        return num;
    }

    public Student getStudentWithMostContacts() {
        Student mostContacts=students[0];
        for(int i=1;i<students.length;i++) {
            if(mostContacts.numberOfContacts()<students[i].numberOfContacts()) {
                mostContacts=students[i];
            }else if(mostContacts.numberOfContacts()==students[i].numberOfContacts()){
                if(mostContacts.getIndex()<students[i].getIndex()){
                    mostContacts=students[i];
                }
            }
        }
        return mostContacts;
    }

    public Student getStudent(long index) {
        for(int i=0;i<students.length;i++){
            if(students[i].getIndex()==index){
                return students[i];
            }
        }
        return null;
    }

    public double getAverageNumberOfContacts() {
        double total=0;
        for(int i=0;i<students.length;i++) {
            total+=students[i].numberOfContacts();
        }
        return total/students.length;
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{\"fakultet\":\"" + name + "\", \"studenti\":[");
        for(int i = 0; i < students.length; i++) {
            sb.append(students[i].toString());
            if(i!=students.length-1)
                sb.append(", ");
        }
        sb.append("]}");

        return sb.toString();
    }
}



public class ContactsTester {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int tests = scanner.nextInt();
        Faculty faculty = null;

        int rvalue = 0;
        long rindex = -1;

        DecimalFormat df = new DecimalFormat("0.00");

        for (int t = 0; t < tests; t++) {

            rvalue++;
            String operation = scanner.next();

            switch (operation) {
            case "CREATE_FACULTY": {
                String name = scanner.nextLine().trim();
                int N = scanner.nextInt();

                Student[] students = new Student[N];

                for (int i = 0; i < N; i++) {
                    rvalue++;

                    String firstName = scanner.next();
                    String lastName = scanner.next();
                    String city = scanner.next();
                    int age = scanner.nextInt();
                    long index = scanner.nextLong();

                    if ((rindex == -1) || (rvalue % 13 == 0))
                        rindex = index;

                    Student student = new Student(firstName, lastName, city,
                            age, index);
                    students[i] = student;
                }

                faculty = new Faculty(name, students);
                break;
            }

            case "ADD_EMAIL_CONTACT": {
                long index = scanner.nextInt();
                String date = scanner.next();
                String email = scanner.next();

                rvalue++;

                if ((rindex == -1) || (rvalue % 3 == 0))
                    rindex = index;

                faculty.getStudent(index).addEmailContact(date, email);
                break;
            }

            case "ADD_PHONE_CONTACT": {
                long index = scanner.nextInt();
                String date = scanner.next();
                String phone = scanner.next();

                rvalue++;

                if ((rindex == -1) || (rvalue % 3 == 0))
                    rindex = index;

                faculty.getStudent(index).addPhoneContact(date, phone);
                break;
            }

            case "CHECK_SIMPLE": {
                System.out.println("Average number of contacts: "
                        + df.format(faculty.getAverageNumberOfContacts()));

                rvalue++;

                String city = faculty.getStudent(rindex).getCity();
                System.out.println("Number of students from " + city + ": "
                        + faculty.countStudentsFromCity(city));

                break;
            }

            case "CHECK_DATES": {

                rvalue++;

                System.out.print("Latest contact: ");
                Contact latestContact = faculty.getStudent(rindex)
                        .getLatestContact();
                if (latestContact.getType().equals("Email"))
                    System.out.println(((EmailContact) latestContact)
                            .getEmail());
                if (latestContact.getType().equals("Phone"))
                    System.out.println(((PhoneContact) latestContact)
                            .getPhone()
                            + " ("
                            + ((PhoneContact) latestContact).getOperator()
                                    .toString() + ")");

                if (faculty.getStudent(rindex).getEmailContacts().length > 0
                        && faculty.getStudent(rindex).getPhoneContacts().length > 0) {
                    System.out.print("Number of email and phone contacts: ");
                    System.out
                            .println(faculty.getStudent(rindex)
                                    .getEmailContacts().length
                                    + " "
                                    + faculty.getStudent(rindex)
                                            .getPhoneContacts().length);

                    System.out.print("Comparing dates: ");
                    int posEmail = rvalue
                            % faculty.getStudent(rindex).getEmailContacts().length;
                    int posPhone = rvalue
                            % faculty.getStudent(rindex).getPhoneContacts().length;

                    System.out.println(faculty.getStudent(rindex)
                            .getEmailContacts()[posEmail].isNewerThan(faculty
                            .getStudent(rindex).getPhoneContacts()[posPhone]));
                }

                break;
            }

            case "PRINT_FACULTY_METHODS": {
                System.out.println("Faculty: " + faculty.toString());
                System.out.println("Student with most contacts: "
                        + faculty.getStudentWithMostContacts().toString());
                break;
            }

            }

        }

        scanner.close();
    }
}