#input of int(split by space)
def get_i()
  return gets.chomp.split(" ").map(&:to_i)
end
#input of float(split by space)
def get_f()
  return gets.chomp.split(" ").map(&:to_f)
end
#input of string(split by space)
def get()
  return gets.chomp.split(" ")
end
#input of string(split per one character)
def get_nsp()
  return gets.chomp.split("")
end
#yes or no decision
def yn_judge(bool,y="Yes",n="No")
  return bool ? y : n 
end
#create of array
def array(size1,init=nil,size2=-1)
  if size2==-1
    return Array.new(size1){init}
  else
    return Array.new(size2){Array.new(size1){init}}
  end
end

def max(a,b)
    return a>b ? a : b
end

def min(a,b)
    return a>b ? b : a
end

INF=Float::INFINITY
N=gets.to_i
a=get_i
odd=[]
even=[]
N.times do|i|
  if (i+1).odd?
    odd.push(a[i])
  else
    even.push(a[i])
  end
end
odd_sum=odd.inject(:+)
even_sum=even.inject(:+)
ans=array(N,0)
ans[0]=odd_sum-even_sum
1.upto(N-1) do|i|
    ans[i]=2*a[i-1]-ans[i-1]
end
puts ans.join(" ")