import java.util.*;
import java.io.*;

class Main {

    public static void main(String[] args) throws IOException{
       
            Scanner sc = new Scanner(new File("adunare.in"));
            PrintWriter pw = new PrintWriter(new File("adunare.out"));
            //int a = sc.nextInt();
            //int b = sc.nextInt();
            //int suma = a + b;
            
            pw.print("0");
            pw.close();
    
    }
    
}