Extra Long Factorials

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

15511210043330985984000000

Solution

#!/bin/python3

import math

import os

import random

import re

import sys

# Complete the 'extraLongFactorials' function below.

# The function accepts INTEGER n as parameter.

def extraLongFactorials(n):

f = lambda x: x * f(x - 1) if x > 1 else 1

print(f(n))

if __name__ == '__main__':

n = int(input().strip())

extraLongFactorials(n)

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