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#include <bits/stdc++.h>
using namespace std;


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
	int n, cnt = 0, x;
	cin >> n;
	for (int a = 1; a <= n; a++) {
		cin >> x;
		cnt += (x == 1);
	}
	if (cnt >= 2) {
		cout << 0 << endl << 2 << endl << "1 2" << endl;
	}
	if (cnt == 1) {
		cout << 1 << endl << 2 << endl << "1 2" << endl;
	}
	if (cnt == 0) {
		cout << 2 << endl << 2 << endl << "1 2" << endl;
	}


    return 0;
}