Problem 21825 --VF

## 21825: VF

Time Limit: 1 Sec  Memory Limit: 64 MB
Submit: 33  Solved: 16
[Submit][Status][Web Board][Creator:][下载FPS1元][添加到购物车][下载测试数据1元][20kb]

## Description

Vasya is the beginning mathematician. He decided to make an important contribution to the science and to become famous all over the world. But how can he do that if the most interesting facts such as Pythagor’s theorem are already proved? Correct! He is to think out something his own, original. So he thought out the Theory of Vasya’s Functions. Vasya’s Functions (VF) are rather simple: the value of the Nth VF in the point S is an amount of integers from 1 to N that have the sum of digits S. You seem to be great programmers, so Vasya gave you a task to find the milliard VF value (i.e. the VF with N = 109) because Vasya himself won’t cope with the task. Can you solve the problem?

## Input

There are multiple test cases.
Integer S (1 ≤ S ≤ 81).

## Output

The milliard VF value in the point S.

## Sample Input

1


## Sample Output

10


[Submit][Status]