import java.util.ArrayList;
import java.util.Scanner;

public class SqrtBack{


    public static void main(String[] args){

        Scanner in = new Scanner(System.in);
        ArrayList<Integer> list = new ArrayList<Integer>();
        for(int i=0; i<=args.length; i++){
            list.add(in.nextInt());
        }
        Integer ai[] = new Integer[list.size()];
        ai = list.toArray(ai);



        for(int j = ai.length-1; j >= 0; j--){

            System.out.printf("%.4f\r\n", Math.sqrt(ai[j]));

        }

    }
}
    i tested it its work fine, cant understand what is wrong

This is TIMUS! args variable is always empty

oh  :P