Perfect Number

题目大意 给你一个整数k （1≤k≤10000 ） 求第k 小的各个数位上的数加起来为10的数 Translated by Khassar

We consider a positive integer perfect, if and only if the sum of its digits is exactly $ 10 $ . Given a positive integer $ k $ , your task is to find the $ k $ -th smallest perfect positive integer.

A single line with a positive integer $ k $ ( $ 1<=k<=10000 $ ).

A single number, denoting the $ k $ -th smallest perfect integer.

1

19

2

28

The first perfect integer is $ 19 $ and the second one is $ 28 $ .