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#263. Ugly Number 题目链接

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