263. Ugly Number
public class Solution {
public boolean isUgly(int num) {
if (num == 1) return true;
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;
}
}