#include <iostream>
using namespace std;

class Rectangle {
  private:
    int width, height;
  public:
    static int rectangles;
    
    Rectangle(int w, int h);
    Rectangle(int s);
    int getWidth() const;
    int getHeight() const;
    void setWidth(int w);
    void setHeight(int h);
    static int getRectanglesNumber();
};

int Rectangle::rectangles = 0;

Rectangle::Rectangle(int w, int h) {
  width = w; height = h;
  rectangles++;
}

Rectangle::Rectangle(int s) {
  width = height = s;
  rectangles++;
}

int Rectangle::getWidth() const { return width;}
int Rectangle::getHeight() const { return height;}
void Rectangle::setWidth(int w) { width = w; }
void Rectangle::setHeight(int h) { height = h; }

static int getRectanglesNumber() {
  //width++; // this is not allowed.
  return Rectangle::rectangles;
}

int main() {
  Rectangle rect1(3,4);
  Rectangle rect2(5);
  cout << "Number of rectangles is " << getRectanglesNumber() << endl;
  cout << "Number of rectangles is " << Rectangle::rectangles << endl;
  cout << "Number of rectangles is " << rect1.rectangles << endl;
}