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#include <iostream>
using namespace std;

int main()
{
	int x,y,z=0;
	cin >> x;
	for (x; x > 0; x--) {
		cin >> y;
		if (y == 1)z++;
	}
	
	if (z == 0) cout << "2" << endl << "2" << endl << "1 2";
	else if (z == 1) cout << "1" << endl << "2" << endl << "1 2";
		else 		cout << "0" << endl << "2" << endl << "1 2";

	

	return 0;
}