#include <stdio.h>
#include <stdlib.h>

#define ENOUGHT 2

void subtree() {
  int ones = 0;
  int akt;
  int n;
  scanf("%d", &n);
  int i = 0;
  while (i < n && ones < ENOUGHT) {
    scanf("%d", &akt);
    if (akt == 1) {
      ones++;
    }
    i++;
  }
  if (ones == ENOUGHT) {
    printf("0\n%d\n1 2\n", ENOUGHT);
  }
  else {
    int change = ENOUGHT - ones;
    printf("%d\n%d\n1 2\n", change, ENOUGHT);
  }
}

int main(int argc, char const *argv[]) {
  subtree();
  return 0;
}