ZOJ Problem Set - 2829
Mike is very lucky, as he has two beautiful numbers, 3 and 5. But he is so greedy that he wants infinite beautiful numbers. So he declares that any positive number which is dividable by 3 or 5 is beautiful number. Given you an integer N (1 <= N <= 100000), could you please tell mike the Nth beautiful number?
The input consists of one or more test cases. For each test case, there is a single line containing an integer N.
For each test case in the input, output the result on a line by itself.
Author: MAO, Yiqiang
Source: Zhejiang University Local Contest 2007, Preliminary