#263
Ugly Number
pupil · 515 · lc easy +28 · verified · 43.2% accepted · 3,824 likes · top 25%
Description
An ugly number is a positive integer whose only prime factors are 2, 3, and 5.
Given an integer n, return true if n is an ugly number, or false otherwise.
Example 1:
Input: n = 6
Output: true
Explanation: 6 = 2 × 3
Example 2:
Input: n = 1
Output: true
Explanation: 1 has no prime factors.
Example 3:
Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes the prime factor 7.
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