ToText.java

import tester.*;

class Point {
  int x, y;
  Point(int x, int y) { this.x = x; this.y = y; }
  boolean belowLeftOf(Point p) { return this.x < p.x && this.y < p.y; }
  boolean aboveRightOf(Point p) { return this.x > p.x && this.y > p.y; }
  double distance(Point p) {
    int dx = p.x - this.x;
    int dy = p.y - this.y;
    return Math.sqrt(dx * dx + dy * dy);
  }
}


  
interface Region {
  boolean contains(Point p);
}
  
class RectRegion implements Region {
  Point lowerLeft, upperRight;
  
  RectRegion(Point lowerL, Point upperR) {
    this.lowerLeft = lowerL;
    this.upperRight = upperR;
  }

  public boolean contains(Point p) { return this.lowerLeft.belowLeftOf(p) && this.upperRight.aboveRightOf(p); }
}
  
class CircleRegion implements Region {
  Point center;
  int radius;
  CircleRegion(Point center, int radius) { this.center = center; this.radius = radius; }
  public boolean contains(Point p) { return this.center.distance(p) < this.radius; }
}
  
class UnionRegion implements Region {
  Region r1, r2;
  UnionRegion(Region r1, Region r2) { this.r1 = r1; this.r2 = r2; }
  public boolean contains(Point p) { return this.r1.contains(p) || this.r2.contains(p); }
}


class IntersectRegion implements Region {
  Region r1, r2;
  IntersectRegion(Region r1, Region r2) {
    this.r1 = r1;
    this.r2 = r2;
  }
  
  public boolean contains(Point p) {
    return this.r1.contains(p) && this.r2.contains(p);
  }
}