static Scanner scanner = new Scanner(System.in);
    static ArrayList<Node> pontok = new ArrayList<>();
    static int[][] elek;
    static int ciklusDb = 0;
    static int elagazasDb = 0;

    static class Node{
        int parent;
        int ertek;
        public ArrayList<Integer> szomszedok = new ArrayList<>();
        Node(int a){
            this.ertek = a;
        }
    }

    public static void main(String[] args)
    {
        int pontDb = 10;
        int elDb = 12;
        elek = new int[][]{
                {1, 2},
                {2, 3},
                {3, 4},
                {4, 6},
                {6, 7},
                {6, 8},
                {7, 4},
                {3, 5},
                {5, 9},
                {9, 10},
                {10, 5},
                {10, 8}
        };

        pontok.add(new Node(1));

        for(int i = 2; i <= pontDb; i++) {
            pontok.add(new Node(i));
            GetNeighbours(pontok.get(i-1));
            for(int j = 0; j < pontok.get(i-1).szomszedok.size(); j++) {

            }
            pontok.get(i-1).szomszedok.clear();
        }

        System.out.println(ciklusDb);
        System.out.println(elagazasDb);
    }

    private static void GetNeighbours(Node i) {
        i.parent = GetParent(i);
        for(int[] a : elek) {
            if(a[0] == i.ertek && a[1] != i.parent) {
                i.szomszedok.add(a[1]);
            }
            else if(a[1] == i.ertek && a[0] != i.parent) {
                i.szomszedok.add(a[0]);
            }
        }
        System.out.println(i.ertek + "'s parent is: " + i.parent);
        System.out.print(i.ertek + "'s children are: ");
        for(int a : i.szomszedok) {
            System.out.print(a + " ");
        }
        System.out.println();
    }


    private static int GetParent(Node i) {
        for(int[] a : elek) {
            if(a[0] == i.ertek) {
                return a[1];
            }
            else if(a[1] == i.ertek) {
                return a[0];
            }
        }
        return 0;
    }