Function
Execution time limit is 1 second
Runtime memory usage limit is 128 megabytes
Let function f(x) is defined as
Calculate the value of f(x) for a given x.
Input
Each line contains one double value x (x ≥ 1).
Output
For each value x print on a separate line the value f(x) with 6 digits after the decimal point.
Examples
Input #1
Answer #1
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