#include<fstream>
using namespace std;
long poz[100000],l[100000],a[100000];
int n;
int main()
{
	ifstream f("scmax.in");
	ofstream g("scmax.out");
	int i,j;
	f>>n;
	for(i=1;i<=n;i++)
		f>>a[i];
	l[n]=1;
	poz[n]=-1;
	for(i=n-1;i>0;i--)
		for(l[i]=1,poz[i]=-1,j=i+1;j<=n;j++)
			if(a[i]<a[j] && l[i]<1+l[j])
			{
				l[i]=1+l[j];
				poz[i]=j;
			}
	int max=l[1];
	int pozmax=1;
	for(i=2;i<=n;i++)
		if(max<l[i])
		{
			max=l[i];
			pozmax=i;
		}
		g<<max<<"\n";
		for(i=pozmax;i!=-1;i=poz[i])
			g<<a[i]<<" ";
}