310306: CF1812E. Not a Geometry Problem

The only line of input contains three integers $x$, $y$, $z$ ($-1000 \le x, y, z \le 1000$).

Output one real number — the answer.

Your answer is considered correct if its absolute or relative error does not exceed $10^6$. Formally, let your answer be $a$, and the jury's answer be $b$. Your answer is accepted if and only if $\frac{|a-b|}{\max(1,|b|)} \le 10^6$.

1 1 1

1.7320508075688772

1 -2 -2

21.727922061357855

998 244 353

-0.0006269592476489029

0 0 0

1792283455048516.3