Task11

import java.util.Scanner;

public class Task11 {
    public static void main(String[] args) {
        double F, x;
        Scanner in = new Scanner(System.in);
        x = in.nextDouble();
        if(x <= 3) F = x * x - 3 * x + 9;
        else F = 1 / (x * x * x + 6);
        System.out.println(F);
    }
}