Question 3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            int width = int.Parse(Console.ReadLine());

            int height = (int)(width * 1.5);

            char one = '#';
            char two = '.';




            for (int i = 0; i < height; i++)
            {

                for (int j = 0; j < width; j++)
                {
                    if ( i % 3 == 0 && j % 3 == 0)
                    {
                        Console.Write(one);
                    }
                    if (i % 3 == 0 && j % 3 != 0)
                    {
                        Console.Write(two);
                    }
                    if (i % 3 != 0 && (j + 1) % 3 == 0 && ( i + 1 ) % 3 != 0)
                    {
                        Console.Write(one);
                    }
                    if (i % 3 != 0 && (j + 1) % 3 != 0 && (i + 1) % 3 != 0)
                    {
                        Console.Write(two);
                    }
                    if ((i + 1) % 3 == 0 && ( j + 2) % 3 == 0)
                    {
                        Console.Write(one);
                    }
                    if ((i + 1) % 3 == 0 && (j + 2) % 3 != 0)
                    {
                        Console.Write(two);
                    }


                }
                Console.WriteLine();


            }

        }
    }
}