This is by far the most readable and clear solution

Thanks for your reply. As expected it was performance issues. Test 30 seems slightly too complex to brute force as I was trying ;)

Here is the log of my code(3 times ran):

Time: 3540ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 70ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 2881ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)



Time: 3430ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 85ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 2692ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)


Time: 5066ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 70ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 4389ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)

So, if your code got timeout, please check it about performance ;-)

Now it passed. I paste the code from another code editor and it passed. I'm pretty sure that you said above was the answer of the inconvenience. Thanks for asking.

That's the same as mine and it worked fine. Make sure you have no new lines or spaces after that, it seems it counts that as more chars.

Taxes? ;)
Seriously talking it counted my code length right, do you have some weird char or something?

My code has 24 characters and the test counts 30. Why?