I often find that part1 can be solved by most, but part2 sometimes needs a clever trick, experience or some knowledge. Doing only part1 or skipping some day is

I often find that part1 can be solved by most, but part2 sometimes needs a clever trick, experience or some knowledge. Doing only part1 or skipping some day is perfectly fine, though. So I don't really get your anger. I actually like when it teaches me something new. If you get stuck you could always google for the concepts you need and learn of them, or go to the subreddit and get hints but still solve the programming part yourself.