using System;

​

public class Program

{

    public static void Main()

    {

        //int[][] a = {{1, 5, 4}, {3, 8, 1}, {4, 6, 2}};

        int[][] a = new int[3][];

        a[0] = new int[3];

        a[1] = new int[3];

        a[2] = new int[4];

        {

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

            {

                for (int j = 0; j < a[i].Length; j++)

                {

                    Console.Write(a[i][j]);

                }

​

                Console.WriteLine();

            }

        }

    }

}