# 1536. Ugly Numbers

Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence

$1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, \ldots$

shows the first $11$ ugly numbers. By convention, 1 is included.

Write a program to find and print the 1500’th ugly number.

### 输出格式

Write The 1500'th ugly number is <number>.

60 人解决，80 人已尝试。

74 份提交通过，共有 244 份提交。

4.0 EMB 奖励。