n,*a=$<.map &:to_i
c=1
b=[]
2.times do
  b=[2-c]
  n.times do |i|
    b<< g=(i%2==0 ? 1:-1)*(a[i]-b[i])
    c=g if c>g
  end
end
puts b.all?{|i|i>0} ? ([n+1]+b).*("\n"):-1