0079. Sikl19

Time limit : 1000 ms
Memory limit : 64 mb

Summani xisoblang


$$y = \sqrt[3]{a^a} + x^2 \cos{ax}$$

$$- \frac{\pi}{2} \le x \le \pi , h = \frac{\pi}{19}$$
Bu yerda $x – \frac{\pi}{2}$ va $\pi$ oralig’ida, $h$ sikl qadami


Kiruvchi ma’lumotlar:

$a$ butun son $(1 \le a \le 20)$;


Chiquvchi ma’lumotlar:

$y$ – masala yechimi $10^{-2}$ aniqlikda chiqarilsin.

Input
2
Output
49.46
Input
3
Output
78.40