mithilesh kumar singh

class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Enter the number of row");

            int n = int.Parse(Console.ReadLine());

            for (int row = 0; row < n; row++)

            {

                for (int coll = 0; coll < (n * 4); coll++)

                {

                    if (coll <= row || (coll >= n && coll <= (n * 2) - (row + 1))

                    || (coll >= n * 2 && coll >= (n * 2) + row && coll < n * 3)

                    || (coll >= (n * 4) - (row + 1))

                    )

                    {

                        Console.Write("*");

                    }

                    else

                    {

                        Console.Write(" ");

                    }

                }

                Console.WriteLine();

            }

            Console.ReadLine();

        }

    }