import java.util.Scanner;

public class Task04
{
  public static void main(String[] args)
  {
    Scanner scan = new Scanner(System.in);
    int n = 10;
    StringBuilder binary = new StringBuilder();

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

    }
  }


//sys string builder