#476. Numbers with digit sum 9
You get n. How many numbers from 1 to n have a digit sum equal to 9?
### Input
One integer n (1 ≤ n ≤ 10⁵).
### Output
A number.
Examples
Input
54075
Output
680
Input
50
Output
5
💡 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.