0080. Sikl20

Time limit : 1000 ms
Memory limit : 64 mb

Summani xisoblang


$$y = acos(x) - \sin x^2$$

$$0 \le x \le 10 , h = 0.5$$
Bu yerda $x$ – 0 va 10 oralig’ida, $h$ sikl qadami


Kiruvchi ma’lumotlar:

$a$ butun son $(0 \le a \le 100)$;


Chiquvchi ma’lumotlar:

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

Input
1
Output
0.87
Input
3
Output
-1.10