Category
Similar Problems
0726. Function with factorials
Time limit : 1000 ms
Memory limit : 64 mb
For the given even positive integer n find the value of
Input
The even positive integer n (2 ≤ n ≤ 100000).
Output
Print the value of f(n) with four digits after the decimal point.
Samples
|
№ |
Input |
Output |
|
1 |
4 |
0.5000 |
|
2 |
256 |
0.0500 |
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