SaltAndPepper

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

namespace _05_SaltAndPepper
{
    class SaltAndPepper
    {
        static void Main(string[] args)
        {
            ulong number = ulong.Parse(Console.ReadLine());
            string command = Console.ReadLine();

            string binaryNumber = Convert.ToString((long)number, 2).PadLeft(64, '0');
            string newBinaryNumber = binaryNumber;


            while (command != "end")
            {
                char[] binaryArray = newBinaryNumber.ToCharArray();

                string[] commandArray = command.Split();
                string spice = commandArray[0];
                int step = int.Parse(commandArray[1]);

                    for (int i = 0; i < 64; i += step)
                    {

                        if (spice == "salt")
                        {

                            binaryArray[63-i] = '0';
                            newBinaryNumber = new string(binaryArray);

                        }
                        else
                        {
                            binaryArray[63-i] = '1';
                            newBinaryNumber = new string(binaryArray);
                        }
                    }

                command = Console.ReadLine();
            }


            long newDecimalNumber = Convert.ToInt64(newBinaryNumber, 2);
            Console.WriteLine(newDecimalNumber);
        }
    }
}