import java.util.Scanner;

class Main {
    static void decimalToBinary(int n) {
        if (n > 1) decimalToBinary(n / 2);
        System.out.print(n % 2);
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        decimalToBinary(n);
    }
}