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Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
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9
Task/N-queens-problem/Mathematica/n-queens-problem-1.math Normal file
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safe[q_List, n_] :=
With[{l = Length@q},
Length@Union@q == Length@Union[q + Range@l] ==
Length@Union[q - Range@l] == l]
nQueen[q_List:{}, n_] :=
If[safe[q, n],
If[Length[q] == n, q,
Cases[Flatten[{nQueen[Append[q, #], n]}, 2] & /@ Range[n],
Except[{Null} | {}]]], Null]

5
Task/N-queens-problem/Mathematica/n-queens-problem-2.math Normal file
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matrixView[n_] :=
Grid[Normal@
SparseArray[MapIndexed[{#, First@#2} -> "Q" &, #], {n, n}, "."],
Frame -> All] & /@ nQueen[n]
matrixView[6] // OutputForm