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#include<iostream>
using namespace std;

int main()
{
int n, a;
bool jeden=false;
cin >> n;

for(int i=0;i<n;i++)	
	{
	cin >> a;
	if(a==1)
		{
		if(jeden)	{ cout << 0 << endl << 2 << endl << 1 << " " << 2 << endl; goto koniec;}
		else	{jeden=true;}
		}
	}

if(jeden)	{cout << 1 << endl << 2 << endl << 1 << " " << 2 << endl;}
else {cout << 2 << endl << 2 << endl << 1 << " " << 2 << endl;}
koniec:

return 0;
}