using System;

public class Program

{

    public static void FindVisit(int[,] a, int[] linked, int i) {

        for(int j = 0; j < linked.Length; j++) {

            Console.WriteLine("{0} {1}", i.ToString(), j.ToString());

            if (a[i,j] == 1 && linked[j] == 0) {

                linked[j] = 1;

                Console.WriteLine("i and j {0} {1}", i.ToString(), j.ToString());

                FindVisit(a, linked, j);

                Console.WriteLine();

            }

        }

    }

    public static void Main()

    {

        int[,] a = new int[3,3] {

            {1, 0, 0}, {0, 1, 0}, {0, 0 , 1}

        };

        int[] linked = new int[3];

        int count = 0;

​

        for(int i = 0; i < linked.Length; i++) {

            Console.WriteLine();

            if (linked[i] == 0) {

                FindVisit(a, linked, i);

                count++;

            }

        }

            for(int j = 0; j < linked.Length; j++) {

                Console.Write(" linked[{0}] is {1}", j.ToString(), linked[j].ToString());

            }       

            Console.WriteLine();

        Console.WriteLine(count.ToString());

    }

}