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Jun 26th, 2017
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  1. require 'set'
  2. class SortedSet
  3. def max
  4. @keys[-1]
  5. end
  6. def min
  7. @keys[0]
  8. end
  9. end
  10. N = gets.chomp.to_i
  11. Y = gets.split.map &:to_i
  12. s = SortedSet.new(Y)
  13. s.first
  14. p s.max
  15. p s.min
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