#include <iostream>
#include <string>

using namespace std;

int main() {
    int arr[100], n;
    cin >> n;
    for (i = 0; i < n; i++) {
        cin >> arr[i] >> " ";
        if (i % 2 == 0) {
            cout << arr[i] << " ";
        }
    }


    return 0;
}