Permutations/Derangements: Difference between revisions

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(Add Factor example)
m (→‎{{header|Factor}}: remove unused import)
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{{works with|Factor|0.98}}
{{works with|Factor|0.98}}
<lang factor>USING: combinators formatting io kernel math math.combinatorics
<lang factor>USING: combinators formatting io kernel math math.combinatorics
math.factorials prettyprint sequences ;
prettyprint sequences ;
IN: rosetta-code.derangements
IN: rosetta-code.derangements