Neurons

using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        List<uint> list = new List<uint>();
        while (true)
        {
            string tmp = Console.ReadLine();
            if (tmp == "-1")
            {
                break;
            }
            uint n = uint.Parse(tmp);
            list.Add(n);
        }
        for (int i = 0; i < list.Count; i++)
        {
            if (list[i] == 0)
            {
                continue;
            }
            char[] numbers = Convert.ToString(list[i], 2).PadLeft(32,'0').ToCharArray();
            int startOne = Array.IndexOf(numbers, '1');
            int lastOne = Array.LastIndexOf(numbers, '1');
            for (int j = startOne; j <= lastOne; j++)
            {
                if (numbers[j] == '1')
                {
                    numbers[j] = '0';
                }
                else if (numbers[j] == '0')
                {
                    numbers[j] = '1';
                }
            }
            string finalResult = new string(numbers);
            list[i] = Convert.ToUInt32(finalResult, 2);
        }
        foreach (var item in list)
        {
            Console.WriteLine(item);
        }
    }
}