void solve()
{
    ll n, test = 0, sum = 0;
    cin >> n;
    ll a[n * 4 - 1];
    for (int i = 0; i < n * 4 - 1; i++)
    {
        cin >> a[i];
        test += a[i];
    }
    for (int i = 1; i <= n; i++)
    {
        sum += (4 * i);
    }
    cout << (sum % test) << endl;
}