using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            int age = 0;
            age = 2017 - int.Parse(input);
            Console.WriteLine(age);
            
        }
    }
}