import java.awt.*;
import java.util.*;

// Compares Point objects by x coordinate and then by y coordinate.
public class PointComparator implements Comparator<Point> {
    public int compare(Point p1, Point p2) {
        int dx = p1.x - p2.x;
        int dy = p1.y - p2.y;

        if (dx == 0) {
            return dy;
        } else {
            return dx;
        }
    }
}