246. Strobogrammatic Number
https://www.lintcode.com/problem/strobogrammatic-number/description
https://leetcode.com/problems/strobogrammatic-number
247-strobogrammatic-number-ii
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https://leetcode.com/problems/strobogrammatic-number
A mirror number is a number that looks the same when rotated 180 degrees (looked at upside down).For example, the numbers "69", "88", and "818" are all mirror numbers.
Write a function to determine if a number is mirror. The number is represented as a string.
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Related problems247-strobogrammatic-number-ii
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