using System;
public class Program
{
    public static void Main()
    {
        DateTime dateTime = new DateTime(2015,1,1);
        int happyday = 0;

        for (int i = 0;i < 365;i++)
        {
            DateTime addday = dateTime.AddDays(i);
            if(addday.Month >= 10 && addday.Day <= 9)
            {
                continue;
            }
            else if (addday.Day >= 10)
            {
                string aaa = addday.Day.ToString();
                int dayten = int.Parse(addday.Day.ToString().Substring(0, 1));
                int dayone = int.Parse(addday.Day.ToString().Substring(1, 1));
                if (dayten + dayone == addday.Month)
                {
                    happyday++;
                }
            }
            else if(addday.Day == addday.Month)
            {
                happyday++;
            }
        }
        Console.WriteLine("{0}", happyday);

    }
}