#include <bits/stdc++.h>
using namespace std;
long long a[200000];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  long long prev = 0;
  long long last = 1e18;
  for (int i = 0; i < n / 2; ++i) {
    long long x;
    cin >> x;
    prev = max(prev, x - last);
    last = x - prev;
    a[i] = prev;
    a[n - i - 1] = last;
  }
  for (int i = 0; i < n; ++i) {
    cout << a[i] << " ";
  }
  cout << endl;
  return 0;
}
