Hello community.

Fortunately, there are so many rich blogs offering problem sets for each topic (e.g., this blog), however, I couldn't find any list of digit-dp problems except this blog, I wished to ask, would you please recommend some other difficult problems regarding this topic?

Thank you for any help you could provide.

Hello Codeforces community. A thing I've noticed in the past few months was contributions shrinking without any receipt of downvotes, what is the reason?

As you know, when the contest is disrupted (I don't know the exact jurgen for it, thus I'm using disruption) Cf Predictor fails to predict the rating, and instead shows a ? in the rightmost column, as shown in the picture below:

What are the alternatives, which can predict the rating during the contest, and are not affected by the disruptions?

Hello codeforces.

Ratings of the Round #740 Div1 are still rolled back, and they have not been returned for about 20 hours (as far as I know). Isn't it a bit unusual? Since in previous rolling backs rating had been return in a few hours, whereas in this contest ratings are rolled back for about a day.

I would also like to tag tourist (as the author) and MikeMirzayanov (as the administrator) in case they have useful information to share with us.

In the end of this blog, I wished to ask way happens to your rating when a contest coincides with the rolling backs? For instance, if a contest is supposed to be unrated for you but because of rolling backs it is not, will you be unrated in the contest after the ratings have returned?

UPD: Ratings have now returned. Thank you!

I really do not understand the usage of hiding comments with too many downvotes. Has it ever happened to you to avoid hitting "here" in these situations?

Hello Codeforces community.

Is there anyway for me to evaluate my performance in virtual contests? I mean is there any way to know if it was a normal contest, what my result and delta would be?

Hello codeforces community

Something grabbed my attention today. I saw I had access to tags of problems of LATOKEN Round 1, and there were options such as Add tag for me. Is it usual? Because I thought tag access is only for contest holders and administrators.

Thank you.

I believe there's a bug in CodeForces ratings, because when ratings are rolled back, my previous contest rating is increased by 2, and it's now the second time it happens. What is the cause?