# 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 <= N <= 10
#
#   SAMPLE INPUT
#   2
#
#   SAMPLE OUTPUT
#   2
#
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