1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#include <bits/stdc++.h>
using namespace std;
int main()
{
	int a, b, x=0;
	cin >> a;
	for(int i = 0; i < a; i++)
	{
		cin >> b;
		if(b==1)
		{
			x++;
		}
	}
	if(x>=2)
	{
		cout << "0" << endl << "2" << endl << "1 2";
	}
	if(x==1)
	{
		cout << "1" << endl << "2" << endl << "1 2";
	}
	if(x==0)
	{
		cout << "2" << endl << "2" << endl << "1 2";
	}
}