using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;


/*
 * 106
 * 93
 * 91
 * 102
 * 91
 * 100
 * 100
 * 97
 * 98
 * 95
 * 平均=97.3
 */
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            foo a = new foo();
            Stopwatch sw = new Stopwatch();
            sw.Start();
            a.start();
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);
        }
    }

    class foo
    {
        public void start()
        {
            int value=0;
            for (long i = 0; i < 1000000; i++)
            {
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);
                AddToBitfield(ref value, 5, 31);

                ReadFromBitfield(ref value, 5);
                ReadFromBitfield(ref value, 5);
                ReadFromBitfield(ref value, 5);
                ReadFromBitfield(ref value, 5);
                ReadFromBitfield(ref value, 5);
            }
        }

        void AddToBitfield(ref int bitfield, int bitCount, int value)
        {
            bitfield <<= bitCount;
            bitfield |= value;
        }

        int ReadFromBitfield(ref int bitfield, int bitCount)
        {
            int value = bitfield & ((1 << bitCount) - 1);
            bitfield >>= bitCount;
            return value;
        }
    }
}