18949번 - Intersection of Parabolas 다국어

Find the area of the region bounded by the following two parabolas: $y=(x-a)^{2}$ and $x=(y-a)^{2}$.

The first line contains a single integer $a$ ($1 \le a \le 10^{18}$).

Print the answer to the problem with exactly $10$ digits after the decimal point, using the standard rounding rules.