263. Ugly Number

time: O(1)

space: O(1)

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