using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;

class Program
{
    static void Main()
    {
        new Magatro().Solve();
    }
}

class Magatro
{
    public void Solve()
    {
        int y = int.Parse(Console.ReadLine());
        Console.WriteLine(2017 - y);
    }
}