Solution: Confusing Number

Statement▼

A confusing number is a number that, when rotated 180 degrees, produces a valid yet different number.

Digits can be rotated $180$ degrees according to the following rules:

The digits $0$ , $1$ , $6$ , $8$ , and $9$ become $0$ , $1$ , $9$ , $8$ , and $6$ respectively when rotated.
The digits $2$ , $3$ , $4$ , $5$ , and $7$ become invalid when rotated.

Given an integer n, return true if n is a confusing number, or false otherwise.

Note: Leading zeros in the rotated result should be ignored. For instance, rotating $8000$ yields $0008$ , which is simply treated as $8$ .

Constraints:

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Problem

Submissions

Solution

A confusing number is a number that, when rotated 180 degrees, produces a valid yet different number.

Digits can be rotated $180$ degrees according to the following rules:

The digits $0$ , $1$ , $6$ , $8$ , and $9$ become $0$ , $1$ , $9$ , $8$ , and $6$ respectively when rotated.
The digits $2$ , $3$ , $4$ , $5$ , and $7$ become invalid when rotated.

Given an integer n, return true if n is a confusing number, or false otherwise.

Note: Leading zeros in the rotated result should be ignored. For instance, rotating $8000$ yields $0008$ , which is simply treated as $8$ .

Constraints:

...