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Competitions

Functions

Function

Let function f(x) is defined as

prb4812.gif

Calculate the value of f(x) for a given x.

Input

Each line contains one double value x (x1).

Output

For each value x print on a separate line the value f(x) with 6 digits after the decimal point.

Time limit 1 second
Memory limit 128 MiB
Input example #1
1
2.3
2.56
7.123456
Output example #1
10.731685
31.926086
40.762019
3725.231017