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Published: May 30, 2020
License: MIT
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README
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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
.
Example 1:
Input: 6
Output: true
Explanation: 6 = 2 × 3
Example 2:
Input: 8
Output: true
Explanation: 8 = 2 × 2 × 2
Example 3:
Input: 14
Output: false
Explanation: 14
is not ugly since it includes another prime factor 7
.
Note:
1
is typically treated as an ugly number.
- Input is within the 32-bit signed integer range: [−231, 231 − 1].
[Math]
Similar Questions
- Happy Number (Easy)
- Count Primes (Easy)
- Ugly Number II (Medium)
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