Function with factorials
For the given even positive integer n find the value of
Specifications
Input
The even positive integer n (2 ≤ n ≤ 100000).
Output
Print the value of f(n) with four digits after the decimal point.
Problem information
Time Limit: 1 secondsMemory Limit: 64 MB
Balls for the passed test: 6.66667
Complexity: 29% 82/116
Classes: Simple mathematics
Example
Example inputSample 1 4 Sample 2 256 |
Example outputSample 1 0.5000 Sample 2 0.0500 |
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