题目链接:https://leetcode.com/problems/ugly-number/
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.
思路:
easy 时间复杂度O(n)
算法:
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