LeetCode Contest Elo Rating K-Factor Participation Threshold

Contest Elo Rating K-Factor Participation Threshold

I need to determine the participation count at which LeetCode transitions a user from a provisional contest Elo K-factor to the standard calculation. The research brief indicates the K-factor may vary based on the number of contests a user has completed, but it does not specify the threshold, whether weekly and biweekly contests share the same counter, or if rated contests only count toward it.

Rating updates are processed asynchronously after a contest ends, so the exact boundary cannot be inferred from immediate leaderboard changes. I want to know whether the threshold applies globally across all contest types or separately for weekly, biweekly, and special events.

What participation count triggers the K-factor change? Do weekly and biweekly contests share the same provisional counter? Is the threshold documented for rated versus unrated contest events?