回答編集履歴
1
別解
test
CHANGED
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@@ -15,3 +15,7 @@
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15
15
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s=gets.chomp
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s.chars.permutation.to_a.flatten.join.split(%r[(#{"."*s.size})]).reject{|s| s==""}
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18
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+
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+
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+
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21
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+
gets.chomp.chars.permutation.inject([]){|ary,perm| ary << perm.join}
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