## Problem 728

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forarslys
Posts: 10
Joined: Thu Jul 30, 2020 9:36 pm

### Re: Problem 728

I am sorry if I am just misunderstainding, but doesn't the problem statement need some information on distinctness of coins?
Without information, shouldn't F(3, 2) equal to 2 instead of 4? - HHH or TTH.
Since they are arranged in a circle, TTH, HTT, THT should all be identical. To obtain the assumed correct value, I think the coins should be numbered 1 to n and first arranged in this order clockwise in a circle... or something like that, though the expected condition is deduced from test cases.
sirpi
Posts: 2
Joined: Thu Apr 18, 2019 1:54 pm

### Re: Problem 728

Just being curious after having more than 100 solvers:
is there a plan to adjust the difficulty of this problem?
hk
Posts: 11257
Joined: Sun Mar 26, 2006 10:34 am
Location: Haren, Netherlands

### Re: Problem 728

10 weeks after publication a problem is moved from recent problems to the archives.
At that moment a difficulty assessment is automatically calculated.
If there are less than 100 solvers the assessment is temporary.
sirpi
Posts: 2
Joined: Thu Apr 18, 2019 1:54 pm

### Re: Problem 728

Thanks for the clarification, though I was aware of the regular calculation method.
I asked my previous question because this problem - if one only checks the fastest solver's table - seems more difficult than it actually is since there was no correct answer in the first 7 hours.
But as far as I understood there won't be any manual adjustments in the final difficulty calculation.
hk