Hello I am really interested in solving more communication tasks but unfortunately they are quite rare and mostly appear in Olympiads. I’ve already seen most of the ones from IOI and other well-known Olympiads so I’m now looking for more from the national Olympiads of other countries.

MikeMirzayanov Div1 quality has been getting worse and worse lately and this issue needs to be fixed. Ill make the divs myself if you guys cant

In the land of coding, there's a site they call home, Where challenges reign and frustrations roam. But within Codeforces' domain, some find despair, As they grapple with glitches and burdens to bear.

The interface, like a labyrinth of dismay, Leaves many lost, with no clear pathway. With obscure tests and constraints so absurd, Navigating Codeforces feels like a blurred word.

Contests, like storms, rage with merciless might, Where time ticks away, engulfed in the fight. But amidst the chaos, as solutions they chase, Many find themselves lost in a tangled embrace.

Rankings, they say, breed envy and spite, As egos inflate with each victorious flight. But behind the facade of the leaderboard's gleam, Lies shattered dreams and a fading team.

For some, Codeforces is a bitter pill, A realm where frustration and doubts instill. Where bugs and errors lurk in the code, And victories, though few, come with a heavy load.

So here's to those who've felt its sting, In Codeforces' realm, where hope takes wing. May your trials and tribulations not be in vain, As you navigate the labyrinth of pain.

Are there any non linear ways to reverse a bitset? For E.G the bitset 1001. Reverse from 1-3 and it would be 0011.