PandaScotlandFlag

using System;

class PandaScotlandFlag
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());

        int sharp = n - 2;
        int floatLine = 1;
        char letter = 'A';

        for (int i = 0; i < n / 2; i++)
        {
            PrintFloatLine(floatLine, i);
            letter = printLetter(letter);
            Console.Write(new string('#', sharp));
            letter = printLetter(letter);
            PrintFloatLine(floatLine, i);
            Console.WriteLine();

            if (i >= 1)
            {
                floatLine++;
            }
            sharp -= 2;
        }

        letter = PrintLineAndOneLetterInTheMiddle(n, letter);

        floatLine = (n - 3) / 2;
        sharp = 1;

        for (int i = 0; i < n / 2; i++)
        {
            PrintFloatLineOnSingleLine(floatLine, i);
            PrintFloatLine(floatLine, i);
            letter = printLetter(letter);
            Console.Write(new string('#', sharp));
            letter = printLetter(letter);
            PrintFloatLineOnSingleLine(floatLine, i);
            PrintFloatLine(floatLine, i);
            Console.WriteLine();

            floatLine--;
            sharp += 2;
        }
    }

    private static void PrintFloatLineOnSingleLine(int floatLine, int i)
    {
        if (i == 0)
        {
            Console.Write(new string('~', floatLine));
        }
    }

    private static char PrintLineAndOneLetterInTheMiddle(int n, char letter)
    {
        Console.Write(new string('-', n / 2));
        letter = printLetter(letter);
        Console.Write(new string('-', n / 2));
        Console.WriteLine();
        return letter;
    }

    private static void PrintFloatLine(int floatLine, int i)
    {
        if (i >= 1)
        {
            Console.Write(new string('~', floatLine));
        }
    }

    private static char printLetter(char letter)
    {
        Console.Write(letter);
        letter++;

        if (letter > 'Z')
        {
            letter = 'A';
        }

        return letter;
    }
}