import java.util.*;
import java.util.Scanner;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner s = new Scanner(System.in);
        int a = s.nextInt();
        System.out.println(2017 - a);

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line = br.readLine();
    }
}