#include<fstream>
using namespace std;
int x[100001];
int main()
{
	int a[100001],urm[100001],i,n,j,max,c;
	ifstream f("scmax.in");
	ofstream g("scmax.out");
	f>>n;
	for(i=1;i<=n;i++)
		f>>a[i];

	x[n]=1;
	urm[n]=-1;

	for(i=n-1;i>=0;i--)
	{
		max=0;
		for(j=i+1;j<=n;j++)
			if(a[i]<a[j]&&x[j]>max)
			{
				urm[i]=j;
				max=x[j];
			}
		x[i]=max+1;
		if(x[i]==1)
			urm[i]=-1;
	}

	max=0;
	for(i=1;i<=n;i++)
		if(x[i]>max)
		{
			max=x[i];
			c=i;
	
	}
	g<<max<<'\n';
	for(i=c;i!=-1;)
	{
		g<<a[i]<<" ";
		i=urm[i];
	}
	
	
			
	
	g.close();
	f.close();
}