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RosettaCodeData/Task/Find-the-missing-permutation/J/find-the-missing-permutation-1.j
Ingy döt Net db842d013d A-M baby
2013-04-10 21:29:02 -07:00

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permutations=: A.~ i.@!@#
missingPerms=: -.~ permutations @ {.
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