#454. Numbers with digit sum 7
You get n. How many numbers from 1 to n have a digit sum equal to 7?
### Input
One integer n (1 ≤ n ≤ 10⁵).
### Output
A number.
Examples
Input
7423
Output
120
Input
62155
Output
329
💡 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.