SymbolToNumber

using System;
using System.Text;

class SymbolToNumber
{
    static void Main()
    {
        int secretNumber = int.Parse(Console.ReadLine());
        string text = Console.ReadLine();
        byte[] asciiBytes = Encoding.ASCII.GetBytes(text);
        long result = 0;
        double finalResult = 0;
        for (int i = 0; i < text.Length; i++)
        {
            if (text[i] == '@')
            {
                break;
            }
            else if ((text[i] >= 'A' && text[i] <= 'Z') || (text[i] >= 'a' && text[i] <= 'z'))
            {
                result = (asciiBytes[i] * secretNumber) + 1000;
            }
            else if (text[i] >= '0' && text[i] <= '9')
            {
                result = asciiBytes[i] + secretNumber + 500;
            }
            else
            {
                result = asciiBytes[i] - secretNumber;
            }
            if (i % 2 == 0)
            {
                finalResult = (result / 100.0);
                Console.WriteLine("{0:F2}", finalResult);
            }
            else
            {
                finalResult = result * 100;
                Console.WriteLine(finalResult);
            }

        }

    }
}