december long challenge 2019
Ratings doesn’t depend on whether your code is partially AC or fully AC. It depends on your overall performance in contest and how well you have performed. Ratings may increase or decrease depending on your contest score.
Yes, you score for partially correct answer and whether you attempt the hardest question or solve each question partially, you’ll be rated according to your final score in long challenges.
It doesn’t matter which code you solve or if you solve it completely or not. Your rating depends upon the total score you got.