using System;

public class Program

{

    public static void Main()

    {

        int N = int.Parse(Console.ReadLine());

        if (N == 0)

            Console.WriteLine(0);

        else 

        {

            int num1 = N/9;

            int num2 = N - num1 * 9;

​

            if (num2 > 0)

                Console.Write(num2);

            for (int i=0; i<num1; i++)

                Console.Write(9);

        }

    }

}