coding a machine learning library in c from scratch

corrections:
23:23 - Forgot to change a cols to a rows in for loop
1:35:10 - You should also check if cur does not require gradient
2:19:31 - `max_i` should be a u64, not u32

code: https://github.com/Magicalbat/videos/tree/main/machine-learning

arena video: https://www.youtube.com/watch?v=jgiMagdjA1s
prng video: https://www.youtube.com/watch?v=_pDPfFsG89A