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Ugly Number

 Write a method to check if a number is ugly number or not.

 

Note: An Ugly number is a positive integer whose prime factors are limited to 2, 3 and 5.

 

Example 1:

Input: n = 6
Output: true
Explanation: 6 = 2 × 3


Example 2:

Input: n = 8
Output: true
Explanation: 8 = 2 × 2 × 2


Example 3:

Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes the prime factor 7.


Example 4:

Input: n = 1
Output: true
Explanation: 1 has no prime factors, therefore all of its prime factors are limited to 2, 3, and 5.


Solution:

Java:


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public static boolean isUgly(int n) {
        if(n==0)
            return false;
        while(n%2==0)
            n=n/2;
        while(n%3==0)
            n=n/3;
        while(n%5==0)
            n=n/5;
        if(n==1)
            return true;
        else
            return false;
}

Python:

def isUgly(n):
        if n==0:
            return False
        while n%2==0:
            n=n/2
        while n%3==0:
            n=n/3
        while n%5==0:
            n=n/5
        if n==1:
            return True
        else:
            return False

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