Hi ! I just solve DejaVu Challenge in C, but rigth to the point. do you think it can be improved by using malloc for list array?

Heap allocation won't improve this great code. Only one thing reducant is that {0*LIST_SIZE} is as same as {0}. You don't need to do multiplication. You might need to read some posts like Heap vs Stack. I suggest viewing this thread: https://stackoverflow.com/questions/161053/which-is-faster-stack-allocation-or-heap-allocation

Oh thanks! I'll have a look at it.. Yes! That multiplication has no sense 😅. I wanted to initialize the whole array with zeros but I better use a for. That idea came to me from anoter language, but it works just for characters Thanks CarrieForle !!