True. But note that the matrix isn't a binary "good/bad". If you know the concepts that underly dynamic programming and can look it up when needed, great. If yo

True. But note that the matrix isn't a binary "good/bad". If you know the concepts that underly dynamic programming and can look it up when needed, great. If you have used it before and can bang out an implementation without looking it up, well, that's even better.