1056. Confusing Number
https://leetcode.com/problems/confusing-number
Description
A confusing number is a number that when rotated 180
degrees becomes a different number with each digit valid.
We can rotate digits of a number by 180
degrees to form new digits.
When
0
,1
,6
,8
, and9
are rotated180
degrees, they become0
,1
,9
,8
, and6
respectively.When
2
,3
,4
,5
, and7
are rotated180
degrees, they become invalid.
Note that after rotating a number, we can ignore leading zeros.
For example, after rotating
8000
, we have0008
which is considered as just8
.
Given an integer n
, return true
if it is a confusing number, or false
otherwise.
Example 1:

**Input:** n = 6
**Output:** true
**Explanation:** We get 9 after rotating 6, 9 is a valid number, and 9 != 6.
Example 2:

**Input:** n = 89
**Output:** true
**Explanation:** We get 68 after rotating 89, 86 is a valid number and 86 != 89.
Example 3:

**Input:** n = 11
**Output:** false
**Explanation:** We get 11 after rotating 11, 11 is a valid number but the value remains the same, thus 11 is not a confusing number
Example 4:

**Input:** n = 25
**Output:** false
**Explanation:** We get an invalid number after rotating 25.
Constraints:
0 <= n <= 109
ac
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