The input array will always be valid and formatted as in the example above.

Great Work

Sir, in your Kata, The "ORDER BY Species" statement check is sensitive to the indentation and thus throws error unless written in the same way. Please correct that and you'll have a great Kata.

Thanks for testing. Regards, suic

Yes, it worked, thanks a lot for being responsive to my issue. Great work
The thing is all other solutions used a different approach which had a higher time complexity but lower space complexity.

Good spot. Thanks for reporting. I've replaced the em dashes. Please check now. Regards, suic

Sir, my solution fails because '—'(em dash) not '-'(hyphen) appears in the input and causes segmentation error as it is some higher level UTF character than C's char, please look into this as this is a trivial problem to correct.
This may also be the reason because of which so low submissions in C are present.

I haven't time to examine your code but I am afraid that in some way you modify the input string.
I think that the real test is

dotest((const char*)"3 16 9 38 95 1131268 49455 347464 59544965313 496636983114762 85246814996697",
                     "3 16 9 38 95 1131268 49455 347464 59544965313 496636983114762 85246814996697");

The input you give in your post is not the good one, expected is correct, your outpput is not.

Yes sir for C, and if you say that a lot of people have passed the C kata, I will try and look back at my solution more closely. But the main problem I was facing was the expected output containing numbers that weren't part of the list. Thanks a lot for looking into my issue.
Input: 3 16 9 38 95 1131268 49455 347464 584576831 1324743690 304105689
Expected: 3 16 9 38 95 1131268 49455 347464 59544965313 496636983114762 85246814996697
My Output: 3 16 9 38 95 1131268 49455 347464 304105689 1324743690 584576831
Also if I am pasting this same input and testing the output in sample tests, my solution works.

Which language (C?)? Give an example of what you say.
107 people passed the C kata and I tried a few solutions without problems. All given numbers are positive.

Expected output contains numbers that aren't part of the list and also in some runs negative numbers are inputted.

Not an issue: 538 guys passed the C kata.