using System;

public class Program

{

    public static void Main()

    {

        // q50 p 101 

        Console.WriteLine("Hello World");

    }

    public static int R(int num , in v)

    {

        int v=0;

        int c=0;

        int nn=0;

        while (num!=-1)

        {

    int a= num %10;

        if (a%2==1&& a>v)

            num/=10;

        }

        while (num!=-1)

        {

            c++;

            num/=10;

        }

        nn=

        return 

    }

}