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Last active August 29, 2015 14:06
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lexicographical permutations
Raw
gistfile1.txt
Question
Input:
2
3
1
Output:
abc
acb
bac
bca
cab
cba
a
Raw
gistfile2.rb
# my answer
('a'..'c').to_a.permutation.map(&:join)
# result
# => ["abc", "acb", "bac", "bca", "cab", "cba"]
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