using System;

public class Program

{

    public static void Main()

    {

​

        int[][] Arr = new int[4][];

        Arr[0] = new int[] {0,1,2,-1, 10};

        Arr[1] = new int[] {4,5,6};

        Arr[2] = new int[] {7,8,9, -12};

        Arr[3] = new int[] {0,0};

        for (int row = 0; row <= Arr.GetUpperBound(0); row++)

        {

            Console.Write("Row ({0}) ", row);

            for (int col = 0; col < Arr[row].Length; col++)

                Console.Write("{0} ", Arr[row][col]);

            Console.WriteLine();

        }

    }

}