03. Square of Stars

using System;

namespace SquareOfStars

{
    class Program
    {
        static void Main()
        {
            int side = int.Parse(Console.ReadLine());

            for (int i = 1; i < side * 2; i+= 2)
            {
                for (int j = 1; j < side * 2; j++)
                {
                    char x = '*';
                    if (j % 2 == 0)
                    {
                        x = ' ';
                    }
                    Console.Write(x);
                }
                Console.WriteLine();
            }
        }
    }
}