You are right, indeed. Having gained some experience since the time I posted the solution, I would change the variable "new" to something like "translated", and the function name "dictionary" to "translate_leet". Thanks for the tipps!

I was not aware of memory leeks back then :) I am now

Solved it, but I am still curious why this was an issue.
When I allocated space for the result string, I have replaced
char *str = (char*)calloc(400, 1);
with
char *str = (char*)calloc(200, 1);
and it passed the last (random) test.
Great Kata!

Hi! My solution (in C) passes all the tests, except the final, random one(it gets an incorrect result with many weird characters in it).
However, when I run the code inside CLion, it gives me a correct answer for that random test.
What could be the problem?