public class Rektangel {
    public Rektangel(int a, int b) {
        this.a = a;
        this.b = b;
    }
    public int omkrets() {
        return 2 * this.a + 2 * this.b;
    }
    public int area() {
        return a * b;
    }
    private int a = 0, b = 0;
} // Rektangel