#include <fstream>
#include <algorithm>
using namespace std;
int v[1005];
int main()
{
	ifstream f("economie.in");
	ofstream g("economie.out");
	int N,i,j;
	f>>N;
	for(i=1;i<=N;i++)
		f>>v[i];
	sort(v+1,v+N+1);
	g<<2<<"\n";
	g<<v[1]<<"\n";
	int ok=1,x;
	i=2;
	while(ok&&i<N+1)
	{
		if(v[i]%v[1]!=0){x=v[i];ok=0;}
		i++;
	}
	if(i<N+1)g<<x;
	f.close();
	g.close();
	return 0;
}