import java.util.Scanner;

public class test {
                public static void main(String[] args) {
                     Scanner scanner = new Scanner(System.in);
                        int num = scanner.nextInt();
                        int count=0;//位数
                        int r=0;//余数
                        int bit=0;//转换后的二进制数；
                        while(num!=0) {
                            r=num%2;
                            num=num/2;
                            bit+= r * Math.pow(10, count);
                            count++;
                        }
                        System.out.println(bit);
                }
}