#936. Number of digits of n!
You get n. How many digits does n! have?
### Input
One integer n (0 ≤ n ≤ 1000).
### Output
A number.
Examples
Input
997
Output
2559
Input
486
Output
1097
💡 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.