Ugly Number

题目描述：

Write a program to check whether a given number is an ugly number.

Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.

Note that 1 is typically treated as an ugly number.

这个题非常简单，直接上代码：

public class Solution {
    public boolean isUgly(int num) {
        if(num<1)
            return false;
        while(num!=1){
        	if(num%2==0){
        		num/=2;continue;
        	}
        	if(num%3==0){
        		num/=3;continue;
        	}
        	if(num%5==0){
        		num/=5;continue;
        	}
        	return false;
        }
        return true;
    }
}