ugly-number.cc

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