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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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13
Task/Permutations-Derangements/PicoLisp/permutations-derangements.l Normal file
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(load "@lib/simul.l") # For 'permute'
(de derangements (Lst)
(filter
'((L) (not (find = L Lst)))
(permute Lst) ) )
(de subfact (N)
(if (>= 2 N)
(if (= 1 N) 0 1)
(*
(dec N)
(+ (subfact (dec N)) (subfact (- N 2))) ) ) )