TTCHAN C++

#include <bits/stdc++.h>
using namespace std;
int a[1000002], i, n;

int main()
{
    freopen("TTCHAN.inp","r",stdin);
    freopen("TTCHAN.out","w",stdout);
    //scanf("%d", &n);
    cin>>n;
    for(i=1; i<=n; i++)
    {
        //scanf("%d", &a[i]);
        cin>>a[i];
    }
    for(i=1; i<=n; i++)
    {
        if(i%2 == 0)
            //printf("%d ", a[i]);
            cout<<a[i]<<" ";
    }
}