So I got the Google Foobar challenge while I was in highschool. I completed up to level 3 of it and got into contact with a recruiter. They said to contact them when I was in college. I then stopped doing the challenge due to school keeping me too busy. I've heard that level 4 is the hardest level and requires high level programming and math concepts to be able to do. Should I complete it now or wait until I have done more difficult courses in cs?