Factorial Calculation Problem Statement

Develop a program to compute the factorial of a given integer 'n'.

The factorial of a non-negative integer 'n', denoted as n!, is the product of all positive integers less than or equal to 'n'.

Explanation:

The factorial is calculated as follows:

n! = n * (n-1) * (n-2) * (n-3) ... * 1

Print the factorial of the given number 'n'. If the factorial is undefined, print 'Error'.

Input:

The only line of input contains a single integer.

Output:

The only line of output should display the factorial of the number or "Error" if it cannot be calculated.

Example:

Input:

5

Output:

120

Constraints:

• -10 <= n <= 12

Note:

The factorial is only defined for non-negative integers. Values of 'n' less than 0 should return 'Error'.