import java.util.Scanner;

public class Problem4
{
  public static void main(String[] args)
  {
    Scanner in = new Scanner(System.in);
    int numberDecimal = in.nextInt();

    StringBuilder binary = new StringBuilder();


    while (numberDecimal > 0) {
      binary.append(numberDecimal % 2);
      numberDecimal = numberDecimal / 2;
    }
    System.out.print(binary.reverse());
  }
}