This is a minor and admittedly picky suggestion that doesn't affect the Kata's functionality. The original description was likely written with an object-oriented language in mind, which explains the reference to a "method".

The only change I'd suggest is updating the C language description to use the term "function" instead of "method", since C doesn't support methods in the OOP sense. Here's a fork with that small wording adjustment, in case you'd like to merge it:
https://www.codewars.com/kumite/68912a45d61d89e470fe3b6c?sel=68912a45d61d89e470fe3b6c

Again, this is purely a cosmetic change.

love it.

Didn't know that refactoring could have concepts but as for OP request, this code has to be "intimidating".
As for me, i decided to go with no libs, but the result is less funky than expected. For the pseudo-random algo I went for Blum Blum Shub and stitched it with some defines.

I've updated the description with a detailed specification of the input.

You need to specify the input in the description. e.g. the image is represented as single char * split over multiple lines, it will always have length/width of blah, holes in circles will never include the circle's edge, etc.

kindly do not post solutions like this, as it goes to the main comment thread where nobody wants to see it

#include <stddef.h>
#include <stdlib.h>

int *twin_sum_solutions(int *input, size_t input_len, size_t *output_len) {
if (input_len < 2) {
*output_len = 0;
return NULL; // Return NULL if there are no pairs
}

int *res = malloc(input_len * sizeof(int));  // Allocate memory for the result
if (!res) {
    *output_len = 0;
    return NULL;  // Return NULL if memory allocation fails
}

*output_len = 0;  // Initialize the result counter

for (size_t i = 0; i < input_len - 1; i++) {
    if (input[i] == input[i + 1]) {  // Check if it's a matching pair
        res[*output_len] = input[i] * 2;  // Store the "twin sum"
        (*output_len)++;
        i++;  // Skip the next element as it's already processed
    }
}

// Resize the memory to the correct size of results
int *final_result = realloc(res, *output_len * sizeof(int));

// If realloc fails and there are results, free the memory
if (!final_result && *output_len > 0) {
    free(res);
    *output_len = 0;
    return NULL;
}

return final_result;  // Return the result (or NULL if no results)

}

tester("pneumonoultramicroscopicsilicovolcanoconiosis", "sisoinoconaclovociliscipocsorcimartluonomuenp");

Merged.

Fixed spelling mistake in C translation.

I think you do not need len. It is a dice so the number of faces is always 6. Unless you are considering a dice for dungeons and dragons.

Yea, I should've chosen a better name. Thanks :D

love it, just the name of prod is a bit misleading, took me a bit to realize what you wanted to do
its actually a denominator of the quotient, so when i(sum-i) is maximum, q is minimum
nice :)

once again, dont make it look good- make it look intimidating... :)

umm really?????