why you calling strlen whole iteration?
i think you should move it to variable

The hint would be "exponentiation laws".

Late reply, but since it seems you're still active as of June 2022:

The goal of this kata is to determine which of the (26) possible shift parameters is the "most likely correct" one, for a given input of an encrypted message string.

Basically, if you did the cryptoanalysis by hand with a pen and paper, you would:

1. take the encrypted message string
2. try all 26 keys/shift parameters to decrypt the string and see which of the 26 resulting messages "most looks like" it is written in english language.

The kata asks you to do this, and return the decryption key/shift parameter that gives "the best result" in step 2) above.

Hope that helps a bit!

Way to easy for a 6KYU IMO

suiiiiiiiiiii

See rampdedlizer post above.

Nice!

Not sure why an empty string is considered a palindrome... Hmmmm

Nice job with the resouce allocation based on the number of digits!

I ran your solution and did not see an access violation. That would just show up in the output window wouldn't it?

I like your use of debugs BTW!!

This one is giving me trouble in c. I'm passing all the tests but getting an access violation.

Pretty tough for a seven... Especially in C :)

i ran my pure python solution 100 times with random input to simulate the acceptance test on my computer and it took 2 minutes. i read up on numpy and got it to
work with it and the same test took just 1 sec. THe same speed as a c version of the challenge.

I learned a lot in this Kata (classes, exceptions etc.) - WELL DONE!!

A lot of typing - I want my half hour back