StringBuilder

import java.util.ArrayList;
import java.util.Scanner;

public class main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        StringBuilder buffer = new StringBuilder();
        int a = Integer.parseInt(scan.nextLine());
        while(a!=0) {
            buffer.append(a%2);
            a/=2;
        }
        buffer.reverse();
        System.out.println(buffer.toString());
    }
}