#935. Digit sum of n!
You get n. Find the sum of the digits of n!.
### Input
One integer n (0 ≤ n ≤ 500).
### Output
A number.
Examples
Input
419
Output
3564
Input
232
Output
1809
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.