Why "0" not counted?

  • -1

    A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down).

    So "0" must be that kind of number. However, it does not appear in the correct answers.

  • 0

    "0" is counted, but "00","000"......should not be counted, because they are not numbers.

  • 0

    But 6009 should be counted. Test case does't cover such kind of numbers

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