1056. Confusing Number
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https://leetcode.com/problems/confusing-number
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, and 9 are rotated 180 degrees, they become 0, 1, 9, 8, and 6 respectively.
When 2, 3, 4, 5, and 7 are rotated 180 degrees, they become invalid.
Note that after rotating a number, we can ignore leading zeros.
For example, after rotating 8000, we have 0008 which is considered as just 8.
Given an integer n, return true if it is a confusing number, or false otherwise.
Example 1:
Example 2:
Example 3:
Example 4:
Constraints:
0 <= n <= 109
