4.Lab4.3 MVR (Solved)

import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.IntStream;

class ArrayQueue<E> {
    E[] elems;
    int length, front, rear;

    @SuppressWarnings("unchecked")
    public ArrayQueue(int maxlength) {
        elems = (E[]) new Object[maxlength];
        clear();
    }

    public boolean isEmpty() {
        return (length == 0);
    }

    public int size() {
        return length;
    }

    public E peek() {
        if (length > 0)
            return elems[front];
        else {
            System.out.println("Queue is empty");
            return null;
        }
    }

    public void clear() {
        length = 0;
        front = rear = 0;
    }

    public void enqueue(E x) {
        elems[rear++] = x;
        if (rear == elems.length) rear = 0;
        length++;
    }

    public E dequeue() {
        if (length > 0) {
            E frontmost = elems[front];
            elems[front++] = null;
            if (front == elems.length) front = 0;
            length--;
            return frontmost;
        } else {
            System.out.println("Queue is empty");
            return null;
        }
    }

    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer();
        IntStream.range(0, size()).forEach(i -> sb.append(elems[i]));
        sb.setLength(sb.length() - 1);
        return sb.toString();
    }
}

class Citizen {
    String imePrezime;
    int lKarta, pasos, vozacka;

    public Citizen(String imePrezime, int lKarta, int pasos, int vozacka) {
        super();
        this.imePrezime = imePrezime;
        this.lKarta = lKarta;
        this.pasos = pasos;
        this.vozacka = vozacka;
    }

    @Override
    public String toString() {
        return imePrezime + "\n";
    }
}

public class MVR {

    /* ID then Passport then Driving license */
    /* Each of them has its own queue */
    /* if multiple documents, apply first for ID, then passport than driving */
    public static void otvoriShalter(ArrayQueue<Citizen> redicaLkarti, ArrayQueue<Citizen> redicaPasos, ArrayQueue<Citizen> redicaVozacka) {
        while (!redicaLkarti.isEmpty()){
            Citizen temp = redicaLkarti.dequeue();
            if (temp.pasos == 0 && temp.vozacka == 0){
                System.out.print(temp);
            } else if(temp.pasos == 1) {
                redicaPasos.enqueue(temp);
            } else {
                redicaVozacka.enqueue(temp);
            }
        }

        while (!redicaPasos.isEmpty()){
            Citizen temp = redicaPasos.dequeue();
            if (temp.vozacka == 0){
                System.out.print(temp);
            } else {
                redicaVozacka.enqueue(temp);
            }
        }

        while (!redicaVozacka.isEmpty()){
            System.out.print(redicaVozacka.dequeue());
        }

    }

    public static void main(String[] args) {

        Scanner br = new Scanner(System.in);
        ArrayQueue<Citizen> redicaLkarti = new ArrayQueue<Citizen>(10);
        ArrayQueue<Citizen> redicaPasos = new ArrayQueue<Citizen>(10);
        ArrayQueue<Citizen> redicaVozacka = new ArrayQueue<Citizen>(10);

        int N = Integer.parseInt(br.nextLine());
        for (int i = 1; i <= N; i++) {
            String imePrezime = br.nextLine();
            int lKarta = Integer.parseInt(br.nextLine());
            int pasos = Integer.parseInt(br.nextLine());
            int vozacka = Integer.parseInt(br.nextLine());
            Citizen covek = new Citizen(imePrezime, lKarta, pasos, vozacka);
            if (lKarta == 1) {
                redicaLkarti.enqueue(covek);
            } else if (pasos == 1)
                redicaPasos.enqueue(covek);
            else
                redicaVozacka.enqueue(covek);
        }
        otvoriShalter(redicaLkarti, redicaPasos, redicaVozacka);
    }
}