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The factorial of the integer , written , is defined as:

Calculate and print the factorial of a given integer.

For example, if , we calculate and get .

Function Description

Complete the extraLongFactorials function in the editor below. It should print the result and return.

extraLongFactorials has the following parameter(s):

  • n: an integer

Note: Factorials of can’t be stored even in a long long variable. Big integers must be used for such calculations. Languages like Java, Python, Ruby etc. can handle big integers, but we need to write additional code in C/C++ to handle huge values.

We recommend solving this challenge using BigIntegers.

Input Format

Input consists of a single integer

Constraints

Output Format

Print the factorial of .

Sample Input

Sample Output

Explanation

Limbajul de programare folosit: python3

Cod:

#!/bin/python3

def extraLongFactorials(n):
    f = 1
    for i in range(2, n + 1):
        f *= i
    print(f)

if __name__ == '__main__':
    n = int(input().strip())
    extraLongFactorials(n)

Scor obtinut: 1.0

Submission ID: 464587991

Link challenge: https://www.hackerrank.com/challenges/extra-long-factorials/problem

Extra Long Factorials