public class waka{

    public static void main(String[] args){

        stats data = new stats();
        System.out.println(data.x);
        System.out.println(data.y);
        double x=2.0;
        data.x= Math.pow(x,x);
        data.y= Math.sqrt(data.x);
        System.out.println(data.x);
        System.out.println(data.y);


    }

}

class stats{
    double x;
    double y;
}