require 'pp'

def divide(poly, div)
  c = poly[-1] / div[-1]
  _poly = []

  len = poly.length
  len.times{|d|
    if len - d < div.length
      _poly[d] = poly[d] - c * div[div.length - (len - d)]
    else
      _poly[d] = poly[d]
    end
  }
  while _poly[-1] == 0
    _poly.pop()
  end

  return _poly
end

d = gets.to_i
poly = gets.strip.split.map{|e| e.to_i}

div = [0, -1, 0, 1]

while div.length <= poly.length
  poly = divide(poly, div)
end

if poly.empty?
  puts 0
  puts 0
else
  puts (poly.length - 1)
  puts poly.join(' ')
end