LeetCode Q263: Ugly Number

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.

Solution:

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

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