using System;
using System.Collections.Generic;
using System.Linq;

static public class Program
{
    static public void Main()
    {
        readEOF();
        var cnt = 0;
        for (var d = new DateTime(2015,1,1); d.Year<=2015; d=d.AddDays(1))
        {
            if (d.Month == d.Day.ToString().Select(x => x - '0').Sum())
                cnt++;
        }
        Console.WriteLine(cnt);
    }
    static void readEOF()
    {
        if (Console.In.Peek() >= 0)
            throw new Exception("invalid input too long input file");
    }

}