https://leetcode.com/problems/ugly-number/description/
题目
Write a program to check whether a given number is an ugly number.
Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.
Note that 1 is typically treated as an ugly number.
题目翻译
题目解析
参考答案
#include <iostream>
using namespace std;
class Solution {
public:
bool isUgly(int num)
{
if (num < 1)
{
return false;
}
if (num == 1)
{
return true;
}
while (1)
{
if (num % 2 == 0)
{
num = num / 2;
continue;
}
else if (num % 3 == 0)
{
num = num / 3;
continue;
}
else if (num % 5 == 0)
{
num = num / 5;
continue;
}
else
{
break;
}
}
return num == 1;
}
};
int main()
{
Solution o;
bool bRet = o.isUgly(14);
return 0;
}
