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

public class prog {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String s = br.readLine();
        int sz = Integer.parseInt(s);

        int counter = 0;
        int lastX = 0;
        int lastY = 0;
        do {
            if (counter == 0) {
                System.out.println("0 0");
            } else {
                int myX = -lastX;
                int myY = -lastY;
                String res = myX + " " + myY;
                System.out.println(res);
            }


            s = br.readLine();
            if ((s != null) && !s.isEmpty()) {
                String[] parts = s.split(" ");
                lastX = Integer.parseInt(parts[0]);
                lastY = Integer.parseInt(parts[1]);
                counter++;
            }

        } while (s != null);

    }





}