Hello Codeforces,

I’m a Div2 participant (around 900 rating) and I was confused after a recent contest that was labeled “Rated for Div2”. My current rating is 913, I joined the round, and afterwards my rating didn’t change at all.

From what I understand, “Rated for Div2” generally means:

• The contest is intended for Div2 users (rating < 1900).
• Only Div2 participants should get rating updates.
• Div1 users can still participate, but for them the round is usually unrated.

However, in my case, even though I am clearly in Div2, my rating remained the same. I’m trying to figure out which of these reasons might apply:

• Maybe I was not counted as an active participant, but i attempted the contest and even solved the first problem.
• Maybe rating changes were delayed or there was some issue in the contest and it was made unrated.
• Or maybe there is some other rule or edge case that I’m missing.

Could someone please explain the exact conditions under which a Div2 user’s rating actually changes in a “Rated for Div2” round, and why it might stay the same even if you are in the target division? Does anybody else have this problem?

contest link : Educational Codeforces Round 189

Edit : i got to know that +0 was incremented indeed, but still, i cannot understand the pattern on which solutions are rewarded increments. ie. at what threshold can i earn in rating > 0, i am quite a new guy in this ecosystem so i would appreciate some.. calm responses (atleast)