With 15 stars you earned by programing yourself (no ai, no looking up solutions on the internet) you will gain this star.

You need to talk t Andreas or Brigitte about your solutions to gain the stamp.

A word of warning: Stars you gain after December 14th do not count, we will take a screenshot of the leaderboard at that moment.

From the FAQ:

Should I use AI to solve Advent of Code puzzles? No. If you send a friend to the gym on your behalf, would you expect to get stronger? Advent of Code puzzles are designed to be interesting for humans to solve - no consideration is made for whether AI can or cannot solve a puzzle. If you want practice prompting an AI, there are almost certainly better exercises elsewhere designed with that in mind.

We will announce how many stars a need for this stamp later on.