It was enough interesting problems, I suggest discuss some of them. Who has proofed solutions of E and H?

I think, it would be helpful to have a filter on the contests history page. For example, filter by division, by a taking part and by duration. Like it has been implemented for the gyms page. It may help to find unsolved div. 2 only contests or special rounds.

Picture to attract your attention.

UPD0 Maybe add order of sorting.