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#include <iostream>
using namespace std;

int main()
{
  int n, i, j, tmp;
  j = 0;
  cin >> n;
  for(i = 0; i < n; i++)
  {
      cin >> tmp;
      if(tmp == 1)
      {
         j++;
         if(j==2) break;
      }
  }
  if (j >= 2)
      cout << 0 << endl << 2 << endl << "1 2";
  if (j == 1)
      cout << 1 << endl << 2 << endl << "1 2";
  if (j == 0)
      cout << 2 << endl << 2 << endl << "1 2";
  return 0;
}