#include <bits/stdc++.h>
using namespace std;
int n, i, x, y, ma, s;
int v[105];
int main()
{
    cin >> n;
    for(i = 1; i <= n; i ++)
        cin >> v[i];
    for(i = 1; i < n; i++)
    {
        cout << v[i] << " ";
        x = abs(v[i]);
        y = abs(v[i + 1]);
        s = x + y;
        ma=(v[i] + v[i + 1]) / 2;
        if(s % 2 == 0) cout << ma << " ";
    }
    cout << v[n];
    return 0;
}