Yes, it was probably that one.

open ^^

Never mind. I named a function open (later renamed to isopen), which probably overrode the implementation of another function with the same name.

I can't reproduce your described behavior with neither the sample tests nor the submission tests. Make sure you have the latest version of the tests by pressing the RESET button.

The current C translation of this kata gives the following error when I try to run the tests. I believe it is caused by a wrong test/library setup.

criterion: Could not initialize inheritable arena: Invalid argument

97 is considered a decreasing number when considering numbers less than 1000, say.

how?

In Go, there is a pointless type MyString which is just an alias to the primitive type string. This even turned against the person who wrote tests, because instead of IsUpperCase("..."), he/she had to write MyString("...").IsUpperCase, which is longer and less convenient. I don't see anything useful in this decision.

Done

https://web.archive.org/web/20220614001843/https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-11.html#%_sec_1.2.4

HINT II: See https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-11.html#%_sec_1.2.4

This link leads to a page not found error. Please update it.

My Go code works fine, it has a time complexity of O(n^2) (which is the best I could do) and passes the basic cases but times out when trying to submit. Quite frustrating.

Edit: I optimized the code which now is O(nlogn) I think. It works and passes all the submit tests in less than 2000 ms.