using System;
using System.Linq;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            //var rl = Console.ReadLine().Split(' ');
            //var s = int.Parse(rl[0]);
            //var f = int.Parse(rl[1]);

            var start = new DateTime(2015, 1, 1);
            var end = new DateTime(2015, 12, 31);

            int result = 0;
            for (var day = start; day <= end; day.AddDays(1) )
            {
                var ten = day.Day / 10;
                var one = day.Day % 10;

                if(day.Month == ten + one)
                {
                    result++;
                }
            }
            
            Console.WriteLine($"{result}");
        }
    }
}