Don't give a sh*t for this. Publish your code with your own signature. On HashNode. On medium. On GitHub. On StackOverflow. Do it. For you and for your career. Take the time to publish an article around that and tweet about this.
If you do, you will gain :
In fact, if the competition does not update their challenge, then this competion is already doomed. One day, someone will solve it, again, and publish the solution. This person will gain some admiration and some gratitude. My advice ? : Be this person.
And, don't stress, take a drink ;)
Cheers ! 🍻