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Factorial!
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You have been given a positive integer N. You need to find and print the Factorial of this number. The Factorial of a positive integer N refers to the product of all number in the range from 1 to N. You can read more about the factorial of a number here.

Input Format:
The first and only line of the input contains a single integer N denoting the number whose factorial you need to find.

Output Format
Output a single line denoting the factorial of the number N.

Constraints
\( 1 \le N \le 10\)

SAMPLE INPUT
2
SAMPLE OUTPUT
2
Time Limit: 1.0 sec(s) for each input file.
Memory Limit: 256 MB
Source Limit: 1024 KB

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