263. Ugly Number - cocoder39/coco39_LC GitHub Wiki

263. Ugly Number

ugly number is 1 or positive numbers whose prime factors only include 2, 3, 5

bool isUgly(int num) {
        if (num <= 0) {
            return false;
        }
        while (true) {
            if (num % 2 == 0) {
                num /= 2;
            }
            else if (num % 3 == 0) {
                num /= 3;
            }
            else if (num % 5 == 0) {
                num /= 5;
            }
            else {
                break;
            }
        }
        return num == 1;
    }