Factorial numbers - C#. �� For. ��

Task
Time limit: 1000 ms,
Memory limit: 256 Mb

By integer natural \(N\) calculate \(N!\) – multiplication of all natural numbers from 1 to N (\(�N!=1 \cdot 2 \cdot 3 \cdot �\cdot�N\) ).

Input
Integer 1<=N<=12.
Ouput
print \(N!\)

Examples

�	Input	Output
1	5	120

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