funk

public class Main {

	public static void main(String[] args) {
		Rectangle rect = new Rectangle();
		rect.a = 3;
		rect.b = 4;
		double a = 1;
		double pole = 0;
		System.out.println (rect.diagonal());
		Rectangle[] tab = new Rectangle[100];
		for (int i = 0; i < tab.length; i++) {
			tab[i].a = a;
			tab [i].b = a;
			a = a/2;
		}
		for (int i = 0; i < tab.length; i++) {
			pole += tab[i].area();
		}
		System.out.println (pole);
	}

}
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public class Rectangle {
	public double a,b;
	public double area() {
		return a*b;
}
	public double perimeter() {
		return 2*a+2*b;
}
	public double diagonal() {
		return Math.sqrt(a*a+b*b);
}
}