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.

 bool isUgly(int num) {

     int k;

     int i;

     if(num <= )

         return ;

     if( == num)

         return ;

     while(num >=  && num %  == ) num /= ;

     while(num >=  && num %  == ) num /= ;

     while(num >=  && num %  == ) num /= ;

     return num == ;

 }