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Permutations/Derangements: Difference between revisions
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do m=i+1 while @.m<@.i; end /*m*/ /* [↓] swap two values. */
parse value @.m @.i with @.i @.m; return 1</lang>
{{out|output|text= when using the default inputs:}}
<pre>
9 derangements for 4 items are:
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