ゆ{2,}式

input_template.rb

def yu; gets.to_i end

class Integer
  def yu sym = nil
    if sym
      yu &sym
    elsif block_given?
      times.map{|i| yield gets.chomp}
    else
      times.map{gets.chomp}
    end
  end
end

class String
  def yu; split.map &:to_i end
end

class Array
  alias yu transpose
end

p yu.yu(:yu).yu
# p gets.to_i.times.map{gets.split.map &:to_i}.transpose