For someone who is at an intermidiate level, are these a good way to practice you computer science / algorithm skills or a good way to learn some new skills. It

For someone who is at an intermidiate level, are these a good way to practice you computer science / algorithm skills or a good way to learn some new skills. It looks like a nice way for me to dive in and try some problems to learn some new things but im.not sure is it really worth it with these questions.