import java.io.FileNotFoundException;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

/**
 *
 * @author sorin
 */
public class prog {

    public static void main(String[] args) throws FileNotFoundException {
       // File homedir = new File(System.getProperty("user.home"));

        // Scanner scanner = new Scanner(new File(homedir, "/Downloads/A-large.in"));
        try {
            Scanner scanner = new Scanner(System.in);
            double radius = Double.parseDouble(scanner.nextLine());
            Set<Point> set = new HashSet<>();
            Point p = new Point(0, 0);
            //addPoints(set, p);

            System.out.println("0 0");

            while (true) {
                String[] line = scanner.nextLine().split(" ");
                p = new Point(Double.parseDouble(line[0]), Double.parseDouble(line[1]));                
                System.out.println((int) -1*(p.x) +" "+ (int) -1*(p.y));

            }
        } catch (Exception ex) {
        }

    }
}