#include <bits/stdc++.h>
using namespace std;
long long a[400001], b[400001];
int main(void) {
  ios::sync_with_stdio(0);
  cin.tie(0);
  unsigned n;
  cin >> n;
  for (unsigned i = 1; i <= n / 2; ++i) cin >> b[i];
  a[1] = 0;
  a[n] = b[1];
  for (unsigned i = 2; i <= n / 2; ++i) {
    if (b[i] - a[i - 1] <= a[n - i + 2]) {
      a[i] = a[i - 1];
      a[n - i + 1] = b[i] - a[i];
    } else {
      a[n - i + 1] = a[n - i + 2];
      a[i] = b[i] - a[n - i + 1];
    }
  }
  for (unsigned i = 1; i <= n; ++i) cout << a[i] << ' ';
  return 0;
}
