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#include <iostream>

using namespace std;

int main()
{
  int n = 0;
  int j = 0;
  int a;
  cin>>n;
  for(int i=0; i<n; i++)
  {
    cin>>a;
    if(a == 1) j++;
  }

  if(j >= 2)
  {
    cout<<0<<endl<<2<<endl<<1<<" "<<2;
  }
  else if(j == 1)
  {
    cout<<1<<endl<<2<<endl<<1<<" "<<2;
  }
  else if(j == 0)
  {
    cout<<2<<endl<<2<<endl<<1<<" "<<2;
  }

  return 0;
}