Hello,
I am using C++ and I have a failure in the random test for:

6418546418566418576418586418596418606418616418636418646418656418666418676418686418699889899909919929939949959969979981000100110021003

Expected: equal to 999
Actual: -1

If the missing element is 999 (so 3 digits), then the sequence starts with 641. The second number is 854.
Since:

In this Kata, you will be given a string of numbers in sequence and your task will be to return the missing number."

I think the correct result should indeed be -1! Or I am not understanding the kata correctly?

Howdy, I need some help from you guys :)

So, I am using C++ and I was able to have a solution that passes all the tests (including the timeout ones), but it fails afterwards on random tests.

Here are 2 examples: 141163297, 415765168. In both cases, my answer is 4 while the random tests expect 3.

I believe it's some problem in my implementation related to some overflow cases, but it's being hard for me to pinpoint the exact reason...
In order to debug better, I was wondering is someone has a working solution at hand and they could provide me for the 2 numbers:
141163297
415765168

the 3 squared numbers whose sum adds to them.

Thanks a lot!