The title should read "... Kayles". OEIS A002186 Sprague-Grundy values for the game of Kayles (octal games .77 and .771).

Hasekll excerpt

kayles = (==0) . foldl1 xor . map (grundy!!)

grundy = map g [0..]
    where
    g 0 = 0
    g n = mex n [grundy!!l `xor` grundy!!r | m<-[n-1,n-2],l<-[0..m`div`2],let r=m-l]
    mex n = minimum . ([1..n] \\)

does dynamic programming work.

In test case 1, how are the last two "IXIXIII" and "XIIIXIXXIX" wins? And are there different test cases for different languages?

Hi Abhiranjan,

What does it mean if both player play optimally?

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