Eggcelent

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

class SatAfternoon4
{
    static void Main()
    {
        int input =int.Parse(Console.ReadLine());
        int eggHeight = 2 * input;
        int eggWidth = 3 * input - 1;
        int bot = input - 1;
        int sheetWidth = 3 * input + 1;
        int[,] matrix = new int[eggHeight, sheetWidth];
        int row = 0;
        int col = input + 1;
        //top row
        for (int i = 0; i < input - 1; i++)
        {
            matrix[row, col + i] = 1;
        }
        //bot row
        for (int i = 0; i < input - 1; i++)
        {
            matrix[row, col + i] = 1;
        }

        //upper left slope
        while (true)
        {
            row++;
            col -= 2;
            matrix[row, col] = 1;
            if (col <= 1)
            {
                //row--;
                //col += 2;
                break;
            }
            //row++;
            //col -= 2;
        }
        //left side
        for (int i = 0; i < input; i++)
        {
            matrix[row + i, col] = 1;
        }
        //lower left side
        row = row + input - 1;
        while (true)
        {
            row++;
            col += 2;
            matrix[row, col] = 1;
            if (row == eggHeight-1)
            {
                //row--;
                //col -= 2;
                break;
            }
        }
        //bot row

        for (int i = 0; i < input-1; i++)
        {
            matrix[row, col] = 1;
            col ++;
        }

        //lower right side
        col--;
        while (true)
        {
            row--;
            col += 2;

            if (col > eggWidth)
            {
                //row--;
                col -= 2;
                break;
            }
            matrix[row, col] = 1;
        }
        //right side

        for (int i = 0; i < input-1; i++)
        {

            matrix[row - i, col] = 1;
        }

        //upper right slope
        row = input / 2  ;
        while (true)
        {
           // matrix[row, col] = 1;
            row--;
            col -= 2;
            matrix[row, col] = 1;
            if (row <= 1)
            {
                //row--;
                //col += 2;
                break;
            }
            //row++;
            //col -= 2;
        }

        //first middle row
        row = input - 1;
        for (int i = 2; i < sheetWidth - 2; i++)
        {
            if (i%2 == 0)
            {
                matrix[row, i] = 2;
            }
            else
            {
                matrix[row, i] = 0;
            }
        }
        //second middle row
        row++;
        for (int i = 2; i < sheetWidth - 2; i++)
        {
            if (i % 2 == 0)
            {
                matrix[row, i] = 0;
            }
            else
            {
                matrix[row, i] = 2;
            }
        }

        //printing
        for (int i = 0; i < eggHeight; i++)
        {
            for (int j = 0; j < sheetWidth; j++)
            {
                if (matrix[i, j] == 0)
                {
                    Console.Write(".");
                }
                else if (matrix[i, j] == 1)
                {
                    Console.Write("*");
                }
                else
                {
                    Console.Write("@");
                }
            }
            Console.WriteLine();
        }






    }
}