using System;
using System.Collections.Generic;
using System.Linq;
    class Program
    {

        static void Main(string[] args)
        {
            var birthYear = int.Parse(Console.ReadLine());
            var birthDay  = new DateTime(birthYear,1,1);
            var current   = new DateTime(2017,6,23);
            var elapsedDays   = (current - birthDay).Days;
            var age = elapsedDays / 365;
            Console.WriteLine(age);
        }
    }