Just an advice : don't push yourself to get neg contribution and waste your precious time. Your time is precious dude. In this era of time maybe learn about AI or focus on problem solving. If you give your time for some useless neg contribution at one point of time i can guarentee that you will regret for wasting your time on this. So do utilize your time. Rest is upto you. It was just an advice. Have a good day.

P.S : if you did this to get plus contribution then you can simply ignore what i said :D

Just write something strange, better using other languages.

Just like this. I'm vert sad because that's my first comment :(

Write a poor contest that everyone hates and spam downvotes.

Please do not do that.

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this

Don't say you want to get negative contribution. Instead, try to get positive contribution.

Wait for a moment, until we all forget you need negative contribution.

Then you can pretend to be a senseless pupil asking "I NEED CONTRIBUTION", use caps to attract others' attention and let them find that you are boring. And make sure that your post is still something to talk about so it wouldn't be deleted that fast.