using System;
public class Program
{
public static void Main()
string s = "";
int x = 0, say = 0;
x = Convert.ToInt32(Console.ReadLine());
if(x>0)
do
int kalan = ( x%2) ;
s += kalan.ToString();
x /=2;
}while(x>0);
}
int boyu = s.Length;
while(boyu>0)
Console.Write("{0}", s.Substring((boyu-1) , 1));
boyu--;
Console.ReadKey();
