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#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    long n;
    cin >> n;
    int ones = 0;
    long k;
    for (; n > 0; n--) {
        cin >> k;
        if (k == 1) {
            ones++;
            if (ones > 1) {
                cout << "0\n2\n1 2\n";
                return 0;
            }
        }
    }
    if (ones == 0)
        cout << "2\n2\n1 2\n";
    else
        cout << "1\n2\n1 2\n";
}