#include <fstream>

using namespace std;
ifstream fin("noroc.in");
ofstream fout("noroc.out");

int v[205],f[205];
int main()
{

  int n,i,j,k,ok=1;
  fin>>n;
  for(i=1;i<=n;i++)
  {
      fin>>v[i];
     f[i]=(f[i-1]+(v[i]*v[i])%n)%n;

     if(f[i]==0)
      {   fout<<i<<"\n";
          for(j=1;j<=i;j++)
          fout<<v[j]<<" ";
        ok=0;
      }
  }
  for(i=1;(i<=n)&&(ok!=0);i++)
    for(j=i+1;(j<=n)&&(ok!=0);j++)
        if(f[i]==f[j])
    {
        fout<<j-i<<"\n";
        for(k=i+1;k<=j;k++)
            fout<<v[k]<<" ";
        ok=0;
    }


    return 0;
}