//
//	Loop1.java
//
//	Read a positive and calculate its cubic root
//		Math.pow(x, 1.0/3.0)

import java.util.Scanner;
public class Loop1
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.print("Input a positive (-1 to quit): ");
		double x = input.nextDouble();
		while(x > 0)
		{
			double answer = Math.pow(x, 1.0/3.0);
			System.out.println("The answer is: " + answer);
			System.out.print("Input a positive (-1 to quit): ");
			x = input.nextDouble();
		}
	}
}