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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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5
Task/Permutations-by-swapping/Mathematica/permutations-by-swapping-1.math Normal file
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perms[0] = {{{}, 1}};
perms[n_] :=
Flatten[If[#2 == 1, Reverse, # &]@
Table[{Insert[#1, n, i], (-1)^(n + i) #2}, {i, n}] & @@@
perms[n - 1], 1];

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Task/Permutations-by-swapping/Mathematica/permutations-by-swapping-2.math Normal file
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Print["Perm: ", #[[1]], " Sign: ", #[[2]]] & /@ perms@4;