using System;
using System.Collections.Generic;
using System.Text;

public class Program
{
   
    public void Proc(){
        
        DateTime stDt = DateTime.Parse("2015-01-01");
        DateTime edDt = DateTime.Parse("2015-12-31");
        
        int ans = 0;
        for (DateTime dt = stDt; dt <= edDt; dt = dt.AddDays(1)) {
            int m = dt.Month;
            string dStr = dt.Day.ToString();
            
            int subTotal = 0;
            foreach (char c in dStr)
            {
                subTotal += int.Parse(c.ToString());
            }
            if(subTotal == m) {
                ans++;
            }
        }
        
        Console.WriteLine(ans);
        
    }

    public static void Main(string[] args)
    {
        Program prg = new Program();
        prg.Proc();
    }
}

class Reader
{
    public static bool IsDebug = true;
    
    private static System.IO.StringReader sr;
    
    public static string ReadLine() {
        if(IsDebug) {
            if(sr == null) {
                sr = new System.IO.StringReader(initStr.Trim());
            }
            return sr.ReadLine();
        } else {
            return Console.ReadLine();
        }
    }
    
    public static int[] GetInt(char delimiter = ' ') {
        string[] inpt = ReadLine().Split(delimiter);
        int[] ret = new int[inpt.Length];
        for(int i=0; i<inpt.Length; i++) {
            ret[i] = int.Parse(inpt[i]);
        }
        return ret;
    }
    
    private static string initStr = @"


123456789 987654321


    ";
}