Actually, I want to change my handle to "antidisestablishmentarianism", but it is too long so I could only change to "antidisestablishment" :(
Actually, I want to change my handle to "antidisestablishmentarianism", but it is too long so I could only change to "antidisestablishment" :(
The past round is unrated,I feel disappointed but I think unrated is the best decision.
So, why an Candidate Master can prepare problems after E? I think codeforces should set a limit.
In the Editorial, it didn't explain the SG function has a cyclic section of length $$$34$$$ by strictly proof. So I hope someone can help me.
And another problem : Why the conclusion that problem-maker cannot prove can become a problem in the contest ?
Although 1710E - Два массива can be found on the internet,this problem is actually a hard problem, *2400 is too outrageous.
Well, Can you image that 1E is well-known?
It is unfair.
I don't want to see that Div4 is a speed competition, so I think it must have at least one *1800 or *1900.
Welcome to show your ideas.