
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner x = new Scanner(System.in);//构造一个SCANNER对象,其传入参数为SYSTEM.IN
int n = x.nextInt();//读取一个INT数值
String str = "";
while(n!=0)
{
str = n%2+str;
n = n/2;
}
System.out.println(str);
}
}


