'''THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.'''

# Bitcoin Cash (BCH)   qpz32c4lg7x7lnk9jg6qg7s4uavdce89myax5v5nuk
# Ether (ETH) -        0x843d3DEC2A4705BD4f45F674F641cE2D0022c9FB
# Litecoin (LTC) -     Lfk5y4F7KZa9oRxpazETwjQnHszEPvqPvu
# Bitcoin (BTC) -      34L8qWiQyKr8k4TnHDacfjbaSqQASbBtTd

# contact :- <EMAIL>



def factorial(input_number: int) -> int:
    """
        Non-recursive algorithm of finding factorial of the
        input number.
        >>> factorial(1)
        1
        >>> factorial(6)
        720
        >>> factorial(0)
        1
    """

    if input_number < 0:
        raise ValueError('Input input_number should be non-negative')
    elif input_number == 0:
        return 1
    else:
        result = 1
        for i in range(input_number):
            result = result * (i + 1)
    return result

'''THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.'''

# Bitcoin Cash (BCH)   qpz32c4lg7x7lnk9jg6qg7s4uavdce89myax5v5nuk
# Ether (ETH) -        0x843d3DEC2A4705BD4f45F674F641cE2D0022c9FB
# Litecoin (LTC) -     Lfk5y4F7KZa9oRxpazETwjQnHszEPvqPvu
# Bitcoin (BTC) -      34L8qWiQyKr8k4TnHDacfjbaSqQASbBtTd

# contact :- <EMAIL>



def factorial(input_number: int) -> int:
    """
        Non-recursive algorithm of finding factorial of the
        input number.
        >>> factorial(1)
        1
        >>> factorial(6)
        720
        >>> factorial(0)
        1
    """

    if input_number < 0:
        raise ValueError('Input input_number should be non-negative')
    elif input_number == 0:
        return 1
    else:
        result = 1
        for i in range(input_number):
            result = result * (i + 1)
    return result

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # Bitcoin Cash (BCH)   qpz32c4lg7x7lnk9jg6qg7s4uavdce89myax5v5nuk # Ether (ETH) -        0x843d3DEC2A4705BD4f45F674F641cE2D0022c9FB # Litecoin (LTC) -     Lfk5y4F7KZa9oRxpazETwjQnHszEPvqPvu # Bitcoin (BTC) -      34L8qWiQyKr8k4TnHDacfjbaSqQASbBtTd # contact :- <EMAIL> Non-recursive algorithm of finding factorial of the         input number.         >>> factorial(1)         1         >>> factorial(6)         720         >>> factorial(0)         1