Hey, dear codeforces community.

Today I want to speak about a really meaningful topic. Since the beginning of my codeforces journey, I always tried to dive even deeper in the platform to discover its features. I recently came across with the feature of "contribution". I was really excited and wanted to have a contribution point. I commented once or twice, and got some upvotes. But after a while I noticed that my upvotes disappeared and my contribution point went to negative! I could not understand and decided to ask to the codeforces community. Why is this happening? Am I doing something wrong? Please enlighten me with your knowledge.

Cheers, coolboy19521