Description:
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Input Format:
The only line of input contains three integers $$$x$$$, $$$y$$$, $$$z$$$ ($$$-1000 \le x, y, z \le 1000$$$).
Output Format:
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 $$$\frac{|a-b|}{\max(1,|b|)} \le 10^6$$$.
Note:
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