Okay, you only have 169 left, but don't rush. Take it slow and enjoy the challenges; they'll get harder.
33 isn't a very complicated challenge; it's actually quite simple. I recommend taking a break and coming back to it from time to time. There will come a time when you'll see the solution and be able to solve it. Also, you should practice, because later on you'll face truly complex challenges. Cheer up!