Soumik Sarkar

Sounds reasonable to me, since we don't have real ratings. I'm not too familiar with the gitgud stuff though, @krofna?

I took a shot at implementing this, should I send a PR?

Ah, but that is only an approximation. See [this comment](https://codeforces.com/blog/entry/82334?#comment-704912) from ffao about how well it works. The true value depends on all participants in the contest. If you are...

It's not clear to me what exactly should be offered. I don't follow what the input of your suggested `cycles :: [vertex] -> [[vertex]]` would be. If by "detecting cycles...

I was recently thinking about this more, and realized that it would have a certain limitation if implemented. The problem is that there is no good way to get historical...

Sorry I'm not sure what you refer to as "potential rating"? Could you explain?

Ah I see. This is not the problem I meant, though this is also something to think about, sure. I'll clarify my older comment: Suppose you virtually participate in contest...

I think that much is feasible, though it might feel a bit odd to a user. An alternate point of view is whether you care about _all_ virtual participants. If...

I think we would want to store the size explicitly too, for bounds checks, since the real size would be >= the requested size.

Yes, but consider that we want to store just one bit, but the `MutableByteArray#` will be the size of a word. We should ideally error on access beyond that one...