#include<fstream>
#include<algorithm>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int a[100001],b[100001],n,nrcur,poz;

int main()
{ int i,j;
	f>>n;
	for(i=1;i<=n;i++)
		f>>a[i];
	for(i=1;i<=n;i++)
		b[i]=1;
	for(i=n;i>=1;i--)
		for(j=i+1;j<=n;j++)
			if(a[j]>a[i])
				if(b[j]+1>b[i])
					b[i]=b[j]+1;
	poz=max_element(b+1,b+n+1)-b;
	nrcur=*max_element(b+1,b+n+1);
	g<<nrcur<<'\n';
	for(i=poz;i<=n;i++)
	{
		if(b[i]==nrcur)
		{
			g<<a[i]<<" ";
			nrcur--;
		}
	}
	
	

	return 0;
}