Bit Builder

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

namespace bitbuilder
{
    class Program
    {
        static void Main(string[] args)
        {
            ulong number = ulong.Parse(Console.ReadLine());
            string positionS = Console.ReadLine();
            string command = Console.ReadLine();
            while (positionS != "quit")
            {
                ulong result = 0;
                int position = int.Parse(positionS);
                if (command == "flip")
                {
                    number = number ^ (uint)(1 << position);
                }
                if (command == "insert")
                {
                    for (int i = 63; i >= 0; i--)
                    {

                        result = result << 1;
                        ulong bit = (number >> i) & 1;
                        result = result | bit;
                        if (i == position)
                        {
                            result = result << 1;
                            result = result | 1;
                        }
                    }
                    number = result;
                }
                if (command == "remove")
                {
                    for (int i = 0; i <= 63; i++)
                    {
                        if (i == position)
                        {
                            continue;
                        }
                        result = result >> 1;
                        ulong bit = (number >> i) & 1;
                        result = result | (bit << 63);
                    }
                    result = result >> 1;

                    number = result;
                }
                positionS = Console.ReadLine();
                if (positionS == "quit")
                {
                    break;
                }
                command = Console.ReadLine();

            }
            Console.WriteLine(number);
        }
    }
}