ol_5_03

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main()
{
    ifstream cin("input.txt");

    int n;
    cin>>n;

    string e = "";
    for(int i = 0; i < n; i++)
    {
        string cur;
        cin>>cur;
        if (i%2 == 0)
            cout<<cur<<' ';
        else
            e += cur + ' ';
    }
    cout<<e;

}