Problem: Compare Version Numbers
Compare two version numbers version1 and version2.
If version1 > version2 return 1,
If version1 < version2 return -1,
otherwise return 0.
You may assume that the version strings are non-empty and contain only digits and the . character. The character does not represent a decimal point and is used to separate number sequences. For instance, 2.5 is not "two and a half" or "half way to version three", it is the fifth second-level revision of the second first-level revision.
Here is an example of version numbers ordering:
0.1 < 1.1 < 1.2 < 1.13 < 1.13.4
The solution is straightforward, separate each number partitioned by "." character.
Then apply the sorting logic described in the problem statement.