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require 'yaml'

def foo(prob)
  if prob < 0.25
    return "*"
  elsif prob < 0.5
    return "+"
  elsif prob < 0.75
    return "/"
  else
    return "-"
  end
end

def bar(prob)
  if prob < 0.25
    return "("
  else
    return ""
  end
end

def tas(prob)
  if prob < 0.25
    return ")"
  else
    return ""
  end
end

solutions_hash = Hash.new

for i in 1..100000
  formula = ""
  bracket_counter = 0
  e = ""
  b = ""
  for i in 1..9
    formula = formula + i.to_f.to_s
    if bracket_counter > 0
      e = tas(rand())
    end
    bracket_counter -= 1 if ")" == e
    formula = formula + e
    formula = formula + foo(rand()) unless 9 == i
    b = bar(rand()) unless 9 == i
    bracket_counter += 1 if "(" == b
    formula = formula + b
    e = ""
    b = ""
  end
  for i in 1..9
    if bracket_counter > 0 
      formula = formula + ")"
      bracket_counter -= 1
    end
  end
  begin
    a = eval(formula)

    if 0 == (a - a.to_i)
      if a > 1899 and a < 2101
        solutions_hash[a] = formula
        File.open("num/"+a.to_s, 'w') {|f| f.write(formula)}
        if a > 1909 and a < 1913
          puts "HEEEEEYYYYYYYYYY" 
          puts formula
          puts a
          puts "HEEEEYYYYY"
        end
      end
    else
      #do nothing
    end
  rescue
    #inf error
  end
end

puts solutions_hash.to_yaml