import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); double d = in.nextDouble(); // X^3 : -20-20 x:-3-3 //left -3 right 3 System.out.printf("%.1f",find(d,-3,3)); } static double find(double d...