CF1812E Not a Geometry Problem

N/A

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 $ .