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  1. def gen(b)
  2.   (1..(b - 1)).inject([[b]]) {|s, i| s + gen(b - i).collect{|j| ([i] + j).sort}}.sort
  3. end
  4.  
  5. arr_uniq = gen(6).uniq.reject { |a| a.uniq.count != a.count }
  6.  
  7. print arr_uniq
  8. puts '', arr_uniq.count
  9.  
Success #stdin #stdout 0.03s 9720KB
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[[1, 2, 3], [1, 5], [2, 4], [6]]
4
https://ideone.com/sWhG4b
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
public

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