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.

class Solution {public:    bool isUgly(int num) {        if(num==0)          return false;        while(num%2==0)        {            num/=2;        }        while(num%3==0)         {             num/=3;         }        while(num%5==0)        {            num/=5;        }         return num==1;    }};