263. Ugly Number(C++)

时间:2023-03-08 17:22:53

263. Ugly Number

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.

所谓丑数,就是不能被2,3,5以外的其他素数整除的数。1,2,3,4,5,6,8,9,10,12,15是最前面的11个丑数。

题目大意:

编写程序判断一个给定的数字是否为“丑陋数” ugly number

丑陋数是指只包含质因子2, 3, 5的正整数。例如,6, 8是丑陋数而14不是,因为它包含额外的质因子7

注意,数字1也被视为丑陋数

结题方法:

让其重复的除2,3,5

C++代码:

 class Solution {
public:
bool isUgly(int num) {
if(num<=) return false;
vector<int> v{,,}; for(auto c:v)
{
while(num%c==) num/=c;
}
return num==;
}
};