/// CF contest

#include<bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    long long n, a[200000] = {}, i, b;
    cin >> n;

    cin >> b;
    a[1] = 0;
    a[n] = b;
    for (i = 2; i <= n / 2; i++)
    {
        cin >> b;
        a[i] = max(a[i - 1], max((long long)0, b - a[n - i + 2]));
        a[n - i + 1] = b - a[i];
    }
    for (i = 1; i <= n; i++)
        cout << a[i] << " ";
    cout << "\n";
    return 0;
}