#include <iostream>
using namespace std;

class Rectangle {
  private:
    int width, height;
  public:
    Rectangle(int w, int h);
    void setWidth(int w);
    void setHeight(int h);
    int getWidth();
    int getHeight();
    friend void modifyDimensions(Rectangle& r, int dw, int dh);
};

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

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

void modifyDimensions(Rectangle& r, int dw, int dh) {
  r.width += dw;
  r.height += dh;
}