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#include <iostream>

using namespace std;

int n, a, b;

int main()
{
	scanf("%d", &n);
	b = 0;
	for (int i = 1; i <= n; i++)
	{
		scanf("%d", &a);
		if (a == 1)b++;
	}
	if (b >= 2)printf("0\n2\n1 2\n");
	if (b == 1)printf("1\n2\n1 2\n");
	if (b == 0)printf("2\n2\n1 2\n");
}