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

namespace Age
{
    public class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Calc(Convert.ToInt32(Console.ReadLine())));
        }


        public static int Calc(int Barth)
        {
            return 2017 - Barth;
        }

    }    

}