Компоненти на сврзаност

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.NoSuchElementException;
import java.util.LinkedList;
import java.util.Stack;

class SLLNode<E> {
    protected E element;
    protected SLLNode<E> succ;

    public SLLNode(E elem, SLLNode<E> succ) {
        this.element = elem;
        this.succ = succ;
    }

    @Override
    public String toString() {
        return element.toString();
    }
}

// Implementacija na redica

interface Queue<E> {

    // Elementi na redicata se objekti od proizvolen tip.

    // Metodi za pristap:

    public boolean isEmpty ();
        // Vrakja true ako i samo ako redicata e prazena.

    public int size ();
        // Ja vrakja dolzinata na redicata.

    public E peek ();
        // Go vrakja elementot na vrvot t.e. pocetokot od redicata.

    // Metodi za transformacija:

    public void clear ();
        // Ja prazni redicata.

    public void enqueue (E x);
        // Go dodava x na kraj od redicata.

    public E dequeue ();
        // Go otstranuva i vrakja pochetniot element na redicata.

}

class LinkedQueue<E> implements Queue<E> {

    // Redicata e pretstavena na sledniot nacin:
    // length go sodrzi brojot na elementi.
    // Elementite se zachuvuvaat vo jazli dod SLL
    // front i rear se linkovi do prviot i posledniot jazel soodvetno.
    SLLNode<E> front, rear;
    int length;

    // Konstruktor ...

    public LinkedQueue () {
        clear();
    }

    public boolean isEmpty () {
        // Vrakja true ako i samo ako redicata e prazena.
        return (length == 0);
    }

    public int size () {
        // Ja vrakja dolzinata na redicata.
        return length;
    }

    public E peek () {
        // Go vrakja elementot na vrvot t.e. pocetokot od redicata.
        if (front == null)
            throw new NoSuchElementException();
        return front.element;
    }

    public void clear () {
        // Ja prazni redicata.
        front = rear = null;
        length = 0;
    }

    public void enqueue (E x) {
        // Go dodava x na kraj od redicata.
        SLLNode<E> latest = new SLLNode<E>(x, null);
        if (rear != null) {
            rear.succ = latest;
            rear = latest;
        } else
            front = rear = latest;
        length++;
    }

    public E dequeue () {
        // Go otstranuva i vrakja pochetniot element na redicata.
        if (front != null) {
            E frontmost = front.element;
            front = front.succ;
            if (front == null)  rear = null;
            length--;
            return frontmost;
        } else
            throw new NoSuchElementException();
    }

}

class GraphNode<E> {
    private int index;//index (reden broj) na temeto vo grafot

    private LinkedList<GraphNode<E>> neighbors;

    public GraphNode(int index, E ime, E prezime) {
        this.index = index;

        neighbors = new LinkedList<GraphNode<E>>();
    }

    public GraphNode(int index) {
        this.index = index;

        neighbors = new LinkedList<GraphNode<E>>();
    }

    boolean containsNeighbor(GraphNode<E> o){
        return neighbors.contains(o);
    }

    void addNeighbor(GraphNode<E> o){
        neighbors.add(o);
    }

    void removeNeighbor(GraphNode<E> o){
        if(neighbors.contains(o))
            neighbors.remove(o);
    }



    public int getIndex() {
        return index;
    }

    public void setIndex(int index) {
        this.index = index;
    }




    public LinkedList<GraphNode<E>> getNeighbors() {
        return neighbors;
    }

    public void setNeighbors(LinkedList<GraphNode<E>> neighbors) {
        this.neighbors = neighbors;
    }

    @Override
    public String toString() {
        String ret= "INFO:"+index+" SOSEDI:";
        for(int i=0;i<neighbors.size();i++)
        ret+=neighbors.get(i).index+" ";
        return ret;

    }
}

class Graph<E> {

    int num_nodes;
    GraphNode<E> adjList[];



    @SuppressWarnings("unchecked")
    public Graph(int num_nodes) {
        this.num_nodes = num_nodes;
        adjList = (GraphNode<E>[]) new GraphNode[num_nodes];
        for (int i = 0; i < num_nodes; i++)
            adjList[i] = new GraphNode<E>(i);
    }

    int adjacent(int x, int y) {
        // proveruva dali ima vrska od jazelot so
        // indeks x do jazelot so indeks y
        return (adjList[x].containsNeighbor(adjList[y])) ? 1 : 0;
    }

    void addEdge(int x, int y) {
        // dodava vrska od jazelot so indeks x do jazelot so indeks y
        if (!adjList[x].containsNeighbor(adjList[y])) {
            adjList[x].addNeighbor(adjList[y]);
        }
    }

    void deleteEdge(int x, int y) {
        adjList[x].removeNeighbor(adjList[y]);
    }

    ArrayList<Integer> najdikomponenti(int start){
      ArrayList<Integer> vkupno = new ArrayList<Integer>();
    boolean visited[] = new boolean[num_nodes];
    vkupno.add(start);
    for (int i = 0; i < num_nodes; i++)
        visited[i] = false;
    visited[start] = true;

    Stack<Integer> s = new Stack<Integer>();
    s.push(start);

    int pom;

    while (!s.isEmpty()) {
        pom = s.peek();
        int pom1 = pom;
        for (int i = 0; i < num_nodes; i++) {
            if(adjacent(pom,i)==1){
                pom1 = i;
                if(!visited[i])
                    break;
            }
        }
        if(!visited[pom1]){
            visited[pom1] = true;
            vkupno.add(pom1);
            s.push(pom1);
        }
        else
            s.pop();
    }


    return vkupno;
    }


    @Override
    public String toString() {
        String ret = new String();
        for (int i = 0; i < this.num_nodes; i++)
            ret += i + ": " + adjList[i] + "\n";
        return ret;
    }

}


public class KomponentiSvrzanost {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int N = Integer.parseInt(br.readLine());


        Graph<String> g = new Graph<String>(N);

        int sosedIndex;
        int i_num_nodes;
        String pom;
        for(int i=0;i<N;i++)
        {
            i_num_nodes = Integer.parseInt(br.readLine());
            for(int j=0;j<i_num_nodes;j++)
            {
                pom = br.readLine();
                sosedIndex = Integer.parseInt(pom);

                g.addEdge(i,sosedIndex);
            }
        }


        int teme = Integer.parseInt(br.readLine());
       ArrayList<Integer> komponenti =g.najdikomponenti(teme);
       Collections.sort(komponenti);
        for(int i =0; i < komponenti.size(); i++)
            System.out.println(komponenti.get(i));
     //   System.out.println(g);
        br.close();
    }

}