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#include<stdlib.h>
#include<iostream>
#include<string>
#include<vector>

using namespace std;

long N;
long sum = 0;

void parse () {
  cin >> N;
}

int main () {
  parse();
  int byla1 = 0;
  long int liczba;
  for (long long i = 0; i < N; ++i) {
    cin >> liczba;
    if (liczba == 1) {
      byla1++;
      if (byla1 == 2) {
        cout << 0 << endl << 2 << endl << "1 2\n";
        return 0;
      }
    }
  }

  cout << 2 - byla1 << endl << 2 << endl << "1 2\n";
  return 0;
}